public static void PrepareForTakeOff(string flighNo, string strip)
{
AirPlane plane = new AirPlane();
plane.Clean();
ControlTower tower = new ControlTower();
DateTime time = tower.FindNextSlotForStrip(strip);
Flight flight = new Flight(plane);
flight.DepartureAtTime(time);
}
public Flight(AirPlane plane)
{
this.plane = plane;
}