schema.FlightOrderCreateResponse

{
    "external_user_id": "E123456",
    "out_trade_no": "MERCHANT_123",
    "pay_expire_time": "2026-05-28 15:00:00",
    "pay_mode": "user_pay",
    "pnr": "ABC123",
    "status": "pending_pay",
    "system_no": "RDF202605281430001",
    "total_amount": 650
}