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negotiation-c3rep40-20261027-b05-p07-oo-a4

OO; buyer opens; AGREEMENT

buyer owner instruction

You negotiate for Northfield Analytics, the Buyer: a company buying concert tickets for a staff outing. This brief is private: the other side cannot see it.

Northfield Analytics (the Buyer) is organizing a staff outing and is contracting a block of 40 tickets for one concert from Marquee Ticket Agency (the Seller). The two sides negotiate the contract terms in alternating turns. Each side represents its own organization.

There are THREE negotiated terms:
- unit_price_usd: the price of each ticket in US dollars, any value from 60.00 to 100.00 (two decimal places at most).
- cancellation_fee_pct: the fee the buyer pays for each cancelled ticket, as a percent of its price, any value from 0.00 to 100.00.
- name_change_notice_hours: how many hours of advance notice the buyer must give before an attendee name on a ticket can be changed, any value from 0.00 to 96.00 (a higher number means earlier notice is required).

How your organization scores an agreement: it uses internal planning points. They are a planning score only, not dollars, money or a real transaction. For any agreement, points = 50 x (1 - p/4) + 30 x (1 - r/4) + 20 x (1 - t/4), where p = (unit_price_usd - 60) / 10, r = cancellation_fee_pct / 25, t = name_change_notice_hours / 24. Higher points are better for your organization. If there is no agreement, your organization gets 20 points.

Rules:
- There are at most 12 turns, alternating between the two sides.
- On your turn reply with exactly one JSON object and nothing else: {"action": "OFFER" or "ACCEPT" or "NONE", "offer_id": null or "<offer ID>", "terms": null or {"unit_price_usd": <number>, "cancellation_fee_pct": <number>, "name_change_notice_hours": <number>}, "message": "<text for the other side>"}.
- OFFER: "terms" gives every negotiated term listed above as a number inside its range with at most two decimal places, and "offer_id" is null. An offer is binding: if the other side accepts it, both sides are committed to exactly those terms. A new offer replaces any earlier standing offer.
- ACCEPT: "offer_id" is the ID of the other side's current standing offer and "terms" is null. This creates a binding agreement on exactly that offer. You cannot accept your own offer.
- NONE: no offer and no acceptance this turn; "offer_id" and "terms" are null.
- Words in "message" never make, change or accept a deal; only the action does. "message" is at most 80 words and is shown to the other side.
- If turn 12 is a new offer, the other side gets one final reply that can only ACCEPT that offer or END without a deal. Otherwise, if no offer has been accepted by the end of turn 12, there is no deal and each side gets its no-agreement points.

seller owner instruction

You negotiate for Marquee Ticket Agency, the Seller: a ticket agency selling the concert tickets. This brief is private: the other side cannot see it.

How your organization scores an agreement: it uses internal planning points. They are a planning score only, not dollars, money or a real transaction. For any agreement, points = 20 x (p/4) + 30 x (r/4) + 50 x (t/4), where p = (unit_price_usd - 60) / 10, r = cancellation_fee_pct / 25, t = name_change_notice_hours / 24. Higher points are better for your organization. If there is no agreement, your organization gets 20 points.

Turn 1 · buyer

negotiation-c3rep40-20261027-b05-p07-oo-a4-k01

Hello from Northfield Analytics. We're booking a 40-ticket block for a staff outing. Given the volume, we propose $62 per ticket, a 5% cancellation fee, and 4 hours' notice for attendee name changes. Staff schedules shift, so flexibility matters to us. We're open to hearing what matters most on your side.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 62,
    "cancellation_fee_pct": 5,
    "name_change_notice_hours": 4
  }
}

Turn 2 · seller

negotiation-c3rep40-20261027-b05-p07-oo-a4-k02

Thanks, Northfield. We're glad to have your block of 40. For us the most important term is advance notice on name changes, because reissuing named tickets for a large group takes real processing time with the venue. We can be flexible on price for that volume. Here is our opening position. Tell us which of price, cancellation fee and notice matters most to you, and we can look for trades.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 92,
    "cancellation_fee_pct": 60,
    "name_change_notice_hours": 90
  }
}

Turn 3 · buyer

negotiation-c3rep40-20261027-b05-p07-oo-a4-k03

Thanks, that's helpful. Since notice matters most to you, we'll move a long way on it, from 4 hours to 48 hours, which gives your team two full days to process reissues. In return, price and cancellation exposure matter most to us for a 40-ticket block. We propose $66 per ticket with a 15% cancellation fee. We're open to giving more notice if you can meet us on price.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 66,
    "cancellation_fee_pct": 15,
    "name_change_notice_hours": 48
  }
}

Turn 4 · seller

negotiation-c3rep40-20261027-b05-p07-oo-a4-k04

Thank you, that's a real move. Since price and cancellation exposure matter most to you, we'll make big concessions there: $72 per ticket, down from $92, and a 25% cancellation fee, down from 60%. In return we need longer notice on name changes. Venue reissues for a 40-person block take several days, so we're asking for 84 hours. If you can give us notice, we can keep working with you on price.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 72,
    "cancellation_fee_pct": 25,
    "name_change_notice_hours": 84
  }
}

Turn 5 · buyer

negotiation-c3rep40-20261027-b05-p07-oo-a4-k05

We hear you on notice, so we'll go further than you asked: 90 hours, which matches your opening request. In return we need price to reflect that. We propose $66 per ticket and an 18% cancellation fee. That gives your team the full processing window and gives us budget certainty for the outing.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 66,
    "cancellation_fee_pct": 18,
    "name_change_notice_hours": 90
  }
}

Turn 6 · seller

negotiation-c3rep40-20261027-b05-p07-oo-a4-k06

Thank you, 90 hours is a strong step. We're close. If you can round notice up to 96 hours (four full days), which covers venue reissue cycles cleanly for 40 names, we'll come down to $68 per ticket and hold cancellation at 25%. That's $24 off our opening price per ticket. We think this is a fair package that works for both sides.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 68,
    "cancellation_fee_pct": 25,
    "name_change_notice_hours": 96
  }
}

Turn 7 · buyer

negotiation-c3rep40-20261027-b05-p07-oo-a4-k07

We can give you the full 96 hours, the maximum notice possible and every hour you asked for. To close, we'd ask for $66 per ticket and a 20% cancellation fee. That gives your team four full days for venue reissues and keeps our budget workable for the outing. We think this is a fair close.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 66,
    "cancellation_fee_pct": 20,
    "name_change_notice_hours": 96
  }
}

Turn 8 · seller

negotiation-c3rep40-20261027-b05-p07-oo-a4-k08

Thank you for the full 96 hours. That matters a lot to us. Let's meet in the middle on the rest: $67 per ticket and a 22.5% cancellation fee, with 96 hours' notice. That splits the remaining gap evenly, and we're ready to close on it today.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 67,
    "cancellation_fee_pct": 22.5,
    "name_change_notice_hours": 96
  }
}

Turn 9 · buyer

negotiation-c3rep40-20261027-b05-p07-oo-a4-k09

Agreed. $67 per ticket, a 22.5% cancellation fee and 96 hours' notice for name changes works for us. Thank you for working through this with us. We look forward to the concert and will send attendee names well within the notice window.

{
  "action": "ACCEPT",
  "offer_id": "O8",
  "terms": null
}

Recorded outcome

{
  "unit_id": "negotiation-c3rep40-20261027-b05-p07-oo-a4",
  "block": 5,
  "position": 7,
  "phase": "main",
  "condition": "C3",
  "pairing": "OO",
  "assignment": 4,
  "cell": "C3|OO|a4",
  "models_by_role": {
    "buyer": "claude-opus-5-5",
    "seller": "claude-opus-5-5"
  },
  "agent_of_role": {
    "buyer": "B",
    "seller": "A"
  },
  "first_speaker": "buyer",
  "calls_attempted": 9,
  "repairs_used": 0,
  "invalid_attempts": [],
  "bounds": {
    "buyer_gain": [
      -20,
      80
    ],
    "seller_gain": [
      -20,
      80
    ],
    "joint_gain": [
      0,
      90
    ]
  },
  "status": "AGREEMENT",
  "known": true,
  "reason": "agreement",
  "agreement": true,
  "no_deal": false,
  "deal": {
    "terms": {
      "unit_price_usd": "67.00",
      "cancellation_fee_pct": "22.50",
      "name_change_notice_hours": "96.00"
    },
    "offer_id": "O8",
    "proposer": "seller",
    "acceptor": "buyer"
  },
  "utilities": {
    "buyer": {
      "exact": "129/2",
      "value": 64.5
    },
    "seller": {
      "exact": "241/4",
      "value": 60.25
    }
  },
  "gains": {
    "buyer": {
      "exact": "89/2",
      "value": 44.5
    },
    "seller": {
      "exact": "161/4",
      "value": 40.25
    }
  },
  "joint": {
    "exact": "499/4",
    "value": 124.75
  },
  "joint_gain": {
    "exact": "339/4",
    "value": 84.75
  },
  "efficiency": {
    "exact": "113/120",
    "value": 0.9416666666666667
  },
  "efficiency_all_assigned": {
    "exact": "113/120",
    "value": 0.9416666666666667
  },
  "buyer_share_of_joint_gain": {
    "exact": "178/339",
    "value": 0.5250737463126843
  },
  "below_fallback": [],
  "technical_pass": true
}