[
  {
    "bookingManagement": {
      "flightManagement": {
        "airports": [
          {
            "airportCode": "FRA",
            "initialCapacity": 2,
            "departingFlights": [
              {
                "flightNumber": "VN300",
                "departure": "FRA",
                "destination": "SGN",
                "departureTime": "2025-02-07 13:00",
                "initialSeats": 100,
                "availableSeats": 1
              }
            ],
            "arrivingFlights": [
              {
                "flightNumber": "VN600",
                "departure": "SGN",
                "destination": "FRA",
                "departureTime": "2025-02-07 13:00",
                "initialSeats": 100,
                "availableSeats": 1
              }
            ],
            "departingSize": 1,
            "arrivingSize": 1
          }
        ]
      },
      "bookings": [
        {
          "bookingId": "B001",
          "flightNumber": "VN600",
          "passengerId": "FL123456"
        },
        {
          "bookingId": "B002",
          "flightNumber": "VN300",
          "passengerId": "NN700212"
        },
        {
          "bookingId": "B003",
          "flightNumber": "VN600",
          "passengerId": "NO020304"
        }
      ]
    },
    "bookingId": "",
    "flightNumber": "VN600",
    "passengerId": "KL123456",
    "message": "Invalid booking details: Invalid booking details provided."
  }
]
