It is not as simple as that. Very often it is a case that the previous client was late and is not finished in time. Therefor, there may be a delay of 10/15 minutes. Usually you will get a text from the girl to say that she will be ready in 10 minutes. After 15/20 minutes and no text, you begin to realise that you have been double-booked. Double booking is reprehensible and an abuse of the client by the escort but it is made a lot worse because most escorts do not bother to send the client a text cancelling the appointment.