private void ParkCall(ManagedSession session, string parkingSpace)
 {
     ParkingLot.ParkedCalls[parkingSpace] = session.uuid;
     session.HangupFunction = () => HandleHangup(parkingSpace);
     Log.WriteLine(LogLevel.Info, string.Format("Park: {0}.", parkingSpace));
     session.Answer();
     session.sleep(500, 0);
     session.SetTtsParameters("cepstral", "allison");
     session.Speak("Holding on extension " + parkingSpace+"<break time='1s' />");
     session.sleep(500, 0);
     session.StreamFile("local_stream://moh", -1);
 }