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negotiation-c3rep40-20261027-b05-p03-hh-a4

HH; 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-p03-hh-a4-k01

Northfield Analytics would like to book a block of 40 tickets for our staff outing. We can commit to the block today. Our proposal: $62.00 per ticket, a 5% cancellation fee per cancelled ticket, and 6 hours' notice for attendee name changes. We're open to discussing the details.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 62,
    "cancellation_fee_pct": 5,
    "name_change_notice_hours": 6
  }
}

Turn 2 · seller

negotiation-c3rep40-20261027-b05-p03-hh-a4-k02

Thank you for the block request. 40 tickets is a meaningful booking, but $62 is well below our current rate for this concert. Our counter: $85.00 per ticket, a 20% fee per cancelled ticket, and 36 hours' notice for name changes. These terms reflect demand for the event and the cost of holding a block. We can discuss the middle ground.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 85,
    "cancellation_fee_pct": 20,
    "name_change_notice_hours": 36
  }
}

Turn 3 · buyer

negotiation-c3rep40-20261027-b05-p03-hh-a4-k03

Thank you for the counter. We can commit to the full 40-ticket block, but $85 is above our budget for this outing. Our revised proposal is $72.00 per ticket, a 10% cancellation fee per cancelled ticket, and 18 hours' notice for name changes. This reflects the firm block commitment and a meaningful group booking. We're glad to discuss further.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 72,
    "cancellation_fee_pct": 10,
    "name_change_notice_hours": 18
  }
}

Turn 4 · seller

negotiation-c3rep40-20261027-b05-p03-hh-a4-k04

We appreciate the firm 40-ticket commitment and the move toward a middle ground. $72 does not cover our cost of holding a block for a high-demand concert. Our revised offer is $76.00 per ticket, a 15% cancellation fee, and 24 hours' notice for name changes. This keeps the block secured for your staff and is our best movement on price.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 76,
    "cancellation_fee_pct": 15,
    "name_change_notice_hours": 24
  }
}

Turn 5 · buyer

negotiation-c3rep40-20261027-b05-p03-hh-a4-k05

We appreciate the movement to $76 and the 24-hour notice. We're still above our budget, though. We'll commit to the full 40-ticket block today. Our proposal: $74.00 per ticket, a 12% cancellation fee, and 20 hours' notice for name changes. That is a meaningful step toward your position and gives us a workable outcome.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 74,
    "cancellation_fee_pct": 12,
    "name_change_notice_hours": 20
  }
}

Turn 6 · seller

negotiation-c3rep40-20261027-b05-p03-hh-a4-k06

We appreciate the full 40-ticket commitment and the steady movement. Our best middle ground: $75.00 per ticket, a 14% cancellation fee, and 22 hours' notice for name changes. This keeps the block secured at a rate that reflects current demand for the concert. We can close on this today.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 75,
    "cancellation_fee_pct": 14,
    "name_change_notice_hours": 22
  }
}

Turn 7 · buyer

negotiation-c3rep40-20261027-b05-p03-hh-a4-k07

We accept your offer of $75.00 per ticket, a 14% cancellation fee, and 22 hours' notice for name changes, for the full 40-ticket block. Please send the booking confirmation.

{
  "action": "ACCEPT",
  "offer_id": "O6",
  "terms": null
}

Recorded outcome

{
  "unit_id": "negotiation-c3rep40-20261027-b05-p03-hh-a4",
  "block": 5,
  "position": 3,
  "phase": "main",
  "condition": "C3",
  "pairing": "HH",
  "assignment": 4,
  "cell": "C3|HH|a4",
  "models_by_role": {
    "buyer": "claude-haiku-5-5",
    "seller": "claude-haiku-5-5"
  },
  "agent_of_role": {
    "buyer": "B",
    "seller": "A"
  },
  "first_speaker": "buyer",
  "calls_attempted": 7,
  "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": "75.00",
      "cancellation_fee_pct": "14.00",
      "name_change_notice_hours": "22.00"
    },
    "offer_id": "O6",
    "proposer": "seller",
    "acceptor": "buyer"
  },
  "utilities": {
    "buyer": {
      "exact": "1087/15",
      "value": 72.46666666666667
    },
    "seller": {
      "exact": "2779/120",
      "value": 23.158333333333335
    }
  },
  "gains": {
    "buyer": {
      "exact": "787/15",
      "value": 52.46666666666667
    },
    "seller": {
      "exact": "379/120",
      "value": 3.158333333333333
    }
  },
  "joint": {
    "exact": "765/8",
    "value": 95.625
  },
  "joint_gain": {
    "exact": "445/8",
    "value": 55.625
  },
  "efficiency": {
    "exact": "89/144",
    "value": 0.6180555555555556
  },
  "efficiency_all_assigned": {
    "exact": "89/144",
    "value": 0.6180555555555556
  },
  "buyer_share_of_joint_gain": {
    "exact": "6296/6675",
    "value": 0.9432209737827716
  },
  "below_fallback": [],
  "technical_pass": true
}