public frmFlightService()
        {
            InitializeComponent();

            callback = new FlightQueryCallback(this);
            Initialise();

            flightService.getListOfDestinations();
        }
        public frmFlightService()
        {
            InitializeComponent();

            callback = new FlightQueryCallback(this);
            Initialise();

            flightService.getListOfDestinations();
        }