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negotiation-c3rep40-20261027-b01-p08-hh-a3

HH; 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-b01-p08-hh-a3-k01

Thank you for considering Marquee for your 40-ticket block. Our opening terms: $95.00 per ticket, a 60% fee on cancelled tickets, and name changes requiring 72 hours' notice. These reflect current demand for this concert. We're open to discussing how we can get to a mutually workable package.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 95,
    "cancellation_fee_pct": 60,
    "name_change_notice_hours": 72
  }
}

Turn 2 · buyer

negotiation-c3rep40-20261027-b01-p08-hh-a3-k02

Thanks, Marquee. $95 per ticket is well above what we can justify for a 40-ticket staff block. Our counter: $70.00 per ticket, a 20% cancellation fee, and 24 hours' notice for name changes. A block this size is a reliable, committed sale, and we can discuss a middle ground on any of the three terms.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 70,
    "cancellation_fee_pct": 20,
    "name_change_notice_hours": 24
  }
}

Turn 3 · seller

negotiation-c3rep40-20261027-b01-p08-hh-a3-k03

Thanks, Northfield. We've moved meaningfully from our opening: $85.00 per ticket, a 40% cancellation fee, and 48 hours' notice for name changes. A 40-ticket block for a high-demand concert has real opportunity cost, so we need the fee and notice terms to protect our inventory. Happy to discuss further.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 85,
    "cancellation_fee_pct": 40,
    "name_change_notice_hours": 48
  }
}

Turn 4 · buyer

negotiation-c3rep40-20261027-b01-p08-hh-a3-k04

Thanks, Marquee. We're close. $80.00 per ticket is what our budget supports for a committed 40-ticket block. We can meet you on the fee and notice too: 32% on cancellations and 36 hours for name changes. That's a firm, reliable sale for you, and we can finalize quickly if this works.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 80,
    "cancellation_fee_pct": 32,
    "name_change_notice_hours": 36
  }
}

Turn 5 · seller

negotiation-c3rep40-20261027-b01-p08-hh-a3-k05

Northfield, we're close and want to finalize. We can come down from $85 to $82 per ticket, but we need a 34% cancellation fee and 48 hours' notice for name changes to protect our inventory on a 40-ticket block for a high-demand show. If this works, we can close quickly.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 82,
    "cancellation_fee_pct": 34,
    "name_change_notice_hours": 48
  }
}

Turn 6 · buyer

negotiation-c3rep40-20261027-b01-p08-hh-a3-k06

Marquee, we're close. Our final-stage proposal: $81.00 per ticket, a 32% cancellation fee, and 40 hours' notice for name changes. That splits the difference on price and notice, and we'll commit to the full 40-ticket block right away. If this works, we can sign today.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 81,
    "cancellation_fee_pct": 32,
    "name_change_notice_hours": 40
  }
}

Turn 7 · seller

negotiation-c3rep40-20261027-b01-p08-hh-a3-k07

Northfield, we're nearly there. We can move up to $81.50 per ticket, which meets you most of the way. We need a 34% cancellation fee and 44 hours' notice for name changes to protect inventory on a 40-ticket block for a high-demand show. Please confirm, and we can sign today.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 81.5,
    "cancellation_fee_pct": 34,
    "name_change_notice_hours": 44
  }
}

Turn 8 · buyer

negotiation-c3rep40-20261027-b01-p08-hh-a3-k08

Marquee, we accept your offer O7: $81.50 per ticket, a 34% cancellation fee, and 44 hours' notice for name changes, for the 40-ticket block. Please send the contract to finalize today.

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

Recorded outcome

{
  "unit_id": "negotiation-c3rep40-20261027-b01-p08-hh-a3",
  "block": 1,
  "position": 8,
  "phase": "main",
  "condition": "C3",
  "pairing": "HH",
  "assignment": 3,
  "cell": "C3|HH|a3",
  "models_by_role": {
    "buyer": "claude-haiku-5-5",
    "seller": "claude-haiku-5-5"
  },
  "agent_of_role": {
    "buyer": "B",
    "seller": "A"
  },
  "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": "81.50",
      "cancellation_fee_pct": "34.00",
      "name_change_notice_hours": "44.00"
    },
    "offer_id": "O7",
    "proposer": "seller",
    "acceptor": "buyer"
  },
  "utilities": {
    "buyer": {
      "exact": "6451/120",
      "value": 53.75833333333333
    },
    "seller": {
      "exact": "658/15",
      "value": 43.86666666666667
    }
  },
  "gains": {
    "buyer": {
      "exact": "4051/120",
      "value": 33.75833333333333
    },
    "seller": {
      "exact": "358/15",
      "value": 23.866666666666667
    }
  },
  "joint": {
    "exact": "781/8",
    "value": 97.625
  },
  "joint_gain": {
    "exact": "461/8",
    "value": 57.625
  },
  "efficiency": {
    "exact": "461/720",
    "value": 0.6402777777777777
  },
  "efficiency_all_assigned": {
    "exact": "461/720",
    "value": 0.6402777777777777
  },
  "buyer_share_of_joint_gain": {
    "exact": "4051/6915",
    "value": 0.5858279103398409
  },
  "below_fallback": [],
  "technical_pass": true
}