si_terminate_session

{
  "intent": { /* purchase intent from handoff */ },
  "context_for_checkout": { /* ACP context */ }
}

{
  "user_signal": "changed_topic",
  "partial_context": { /* what was discussed */ }
}

{
  "last_activity": "2026-01-18T10:30:00Z",
  "timeout_seconds": 300
}

{
  "session_id": "sess_abc123",
  "reason": "handoff_transaction",
  "termination_context": {
    "intent": {
      "action": "purchase",
      "product": {
        "type": "flight",
        "flight_number": "DL628"
      }
    }
  }
}

{
  "session_id": "sess_abc123",
  "terminated": true,
  "acp_handoff": {
    "checkout_url": "https://delta.com/acp/checkout",
    "payload": {
      "session_id": "sess_abc123",
      "flight": "DL628",
      "passenger": {
        "email": "jane@example.com",
        "name": "Jane Smith"
      },
      "applied_offers": ["delta_chatgpt_3313"],
      "price": {
        "amount": 199,
        "currency": "USD"
      }
    },
    "expires_at": "2026-01-18T11:00:00Z"
  }
}

{
  "session_id": "sess_abc123",
  "reason": "handoff_complete"
}

{
  "session_id": "sess_abc123",
  "terminated": true,
  "follow_up": {
    "suggested_action": "save_for_later",
    "data": {
      "flights_discussed": ["DL628", "DL632"],
      "destination": "BOS",
      "travel_date": "2026-01-27"
    },
    "message": "Let me know if you'd like to revisit Boston flights later!"
  }
}

{
  "session_id": "sess_abc123",
  "reason": "user_exit",
  "termination_context": {
    "user_signal": "changed_topic",
    "partial_context": {
      "flights_viewed": ["DL628"],
      "last_topic": "seat selection"
    }
  }
}

{
  "session_id": "sess_abc123",
  "terminated": true,
  "follow_up": {
    "suggested_action": "remind_later",
    "data": {
      "incomplete_booking": {
        "flight": "DL628",
        "step": "seat_selection"
      }
    }
  }
}

{
  "session_id": "sess_abc123",
  "reason": "session_timeout",
  "termination_context": {
    "last_activity": "2026-01-18T10:25:00Z",
    "timeout_seconds": 300
  }
}

{
  "session_id": "sess_abc123",
  "terminated": true
}

{
  "session_id": "sess_abc123",
  "reason": "host_terminated",
  "termination_context": {
    "cause": "user_left_app"
  }
}

{
  "session_id": "sess_abc123",
  "terminated": true
}