message: Add a flight in input.json that specifies the service class
diff: },
  "weight": "15",
  "weight_uom": "lbs"
  + },
  + {
  + "id": "6",
  + "type": "flight",
  + "carrier": "Air France",
  + "flight_number": "AF666",
  + "class": "business",
  + "from": {
  + "country": "France",
  + "city": "Paris",
  + "address": "Charle de Gaulle"
  + },
  + "to": {
  + "country": "Portugal",
  + "city": "Lisbon"
  + }
  }
  ]
  }
  