In the olden days it is not unusual to wait for an appointment. When you meet someone in a public place you specify the exact location and the exact time. But almost always there is someone who would be waiting.
In this digital age that we have the mobile phone to communicate, waiting is not much a problem since the one who is coming late can text or call to inform the other party who might be waiting. But then again the waiting would still be there. And the usual reason is the traffic.
Do you bring your mobile phone always?