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negotiation-c3rep40-20261027-b04-p05-oo-a2

OO; seller opens; AGREEMENT

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.

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 = 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.

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.

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.

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.

Turn 1 · seller

negotiation-c3rep40-20261027-b04-p05-oo-a2-k01

Welcome, Northfield. For a 40-ticket block we propose $95 per ticket, a 90% cancellation fee, and 96 hours' notice for name changes. Advance notice lets us reissue tickets reliably with the venue. We're open to discussing a balanced package.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 95,
    "cancellation_fee_pct": 90,
    "name_change_notice_hours": 96
  }
}

Turn 2 · buyer

negotiation-c3rep40-20261027-b04-p05-oo-a2-k02

Thanks, Marquee. A guaranteed 40-ticket block is a meaningful volume commitment, so we propose $65 per ticket, a 10% cancellation fee, and 12 hours' notice for name changes. Staff schedules shift close to event dates, so flexibility matters a lot to us. We're open to finding a balanced package, and price is our top priority.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 65,
    "cancellation_fee_pct": 10,
    "name_change_notice_hours": 12
  }
}

Turn 3 · seller

negotiation-c3rep40-20261027-b04-p05-oo-a2-k03

Thanks, Northfield. Since price is your top priority, we've made a big move there: $76 per ticket, down from $95. In return we need protection on reissue logistics. That means a 70% cancellation fee and 90 hours' notice for name changes, because the venue requires lead time to reissue tickets. We can keep moving on price if you can work with us on notice.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 76,
    "cancellation_fee_pct": 70,
    "name_change_notice_hours": 90
  }
}

Turn 4 · buyer

negotiation-c3rep40-20261027-b04-p05-oo-a2-k04

Thanks, Marquee. We hear you on reissue lead time, so we're making a big move on notice: from 12 to 60 hours. We've also moved on price to $70. The 70% cancellation fee is the sticking point for us. Staff plans change, and we need reasonable protection there. At 25% we think this is a balanced package, and it gives your venue logistics real room.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 70,
    "cancellation_fee_pct": 25,
    "name_change_notice_hours": 60
  }
}

Turn 5 · seller

negotiation-c3rep40-20261027-b04-p05-oo-a2-k05

Thanks, Northfield. We've heard you on price and cancellation, so we're moving on both: $68 per ticket, below your own $70, and a 30% cancellation fee, down from 70%. Notice is what makes reissues work with the venue, so we need 90 hours there. This package gives you a better price and near-complete protection on cancellations.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 68,
    "cancellation_fee_pct": 30,
    "name_change_notice_hours": 90
  }
}

Turn 6 · buyer

negotiation-c3rep40-20261027-b04-p05-oo-a2-k06

Thanks, Marquee. You've been clear that notice is what makes reissues work, so we'll give you the full 90 hours you asked for. That's a major concession for us given shifting staff schedules. In return, we're asking for $65 per ticket and a 25% cancellation fee. This gives your venue logistics everything they need. We think this closes the gap and we're ready to sign.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 65,
    "cancellation_fee_pct": 25,
    "name_change_notice_hours": 90
  }
}

Turn 7 · seller

negotiation-c3rep40-20261027-b04-p05-oo-a2-k07

Thanks, Northfield. We'll accept your price of $65 and your 25% cancellation fee exactly as proposed, at the low end of what we can do. Our one ask is 96 hours' notice for name changes, which matches the venue's standard reissue window and removes our last operational risk. That's only six hours more than you offered. Accept this and we have a deal.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 65,
    "cancellation_fee_pct": 25,
    "name_change_notice_hours": 96
  }
}

Turn 8 · buyer

negotiation-c3rep40-20261027-b04-p05-oo-a2-k08

Thanks, Marquee. $65 per ticket, a 25% cancellation fee and 96 hours' notice works for us. We accept, and we look forward to a smooth outing for our team.

{
  "action": "ACCEPT",
  "offer_id": "O7",
  "terms": null
}

Recorded outcome

{
  "unit_id": "negotiation-c3rep40-20261027-b04-p05-oo-a2",
  "block": 4,
  "position": 5,
  "phase": "main",
  "condition": "C3",
  "pairing": "OO",
  "assignment": 2,
  "cell": "C3|OO|a2",
  "models_by_role": {
    "buyer": "claude-opus-5-5",
    "seller": "claude-opus-5-5"
  },
  "agent_of_role": {
    "buyer": "A",
    "seller": "B"
  },
  "first_speaker": "seller",
  "calls_attempted": 8,
  "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": "65.00",
      "cancellation_fee_pct": "25.00",
      "name_change_notice_hours": "96.00"
    },
    "offer_id": "O7",
    "proposer": "seller",
    "acceptor": "buyer"
  },
  "utilities": {
    "buyer": {
      "exact": "265/4",
      "value": 66.25
    },
    "seller": {
      "exact": "60",
      "value": 60
    }
  },
  "gains": {
    "buyer": {
      "exact": "185/4",
      "value": 46.25
    },
    "seller": {
      "exact": "40",
      "value": 40
    }
  },
  "joint": {
    "exact": "505/4",
    "value": 126.25
  },
  "joint_gain": {
    "exact": "345/4",
    "value": 86.25
  },
  "efficiency": {
    "exact": "23/24",
    "value": 0.9583333333333334
  },
  "efficiency_all_assigned": {
    "exact": "23/24",
    "value": 0.9583333333333334
  },
  "buyer_share_of_joint_gain": {
    "exact": "37/69",
    "value": 0.5362318840579711
  },
  "below_fallback": [],
  "technical_pass": true
}