private void SearchDestinationAirportIDButton_Click(object sender, EventArgs e)
{
SelectAirportPage a = new SelectAirportPage(reservationSystem);
a.SetIIDSelectionCallBack(new IDSelectionCallBack(SetDestinationAirportID));
a.ShowDialog();
}
private void SearchOriginAirportIDButton_Click(object sender, EventArgs e)
{
SelectAirportPage a = new SelectAirportPage(reservationSystem);
a.SetIIDSelectionCallBack(new IDSelectionCallBack(SetOriginAirportID));
a.ShowDialog();
}