No Show - 'make up' protocol What's the fair thing?

It goes both ways I know - guys no show the girls too.

I'm curious though what do you all ladies and gentlemen think is appropriate for "making up" having no showed someone?

Say the appointment time is 1pm, and the guy texts at 12n to make sure all is good, she responds, fine. Guy drives about 30 minutes to location. Get's there a few minutes early - just to make sure. Text's lady for room number right at 1pm - hmm...no response. Waits for a while, makes a call, no answer. Waits a bit, longer, and finally a text comes in at 1:30p, that she cannot make it, and would like to reschedule for later that day.

Guy drives back to the office 30 minutes. So wasted a little over 1.5 hrs.

(Not to complicate it - but the mid day appt was what the gentleman requested so he would be able to avoid traffic to the incall and back to the office. And now she's requested a later time, adding more than 15 minutes each way due to rush-hour)

What's fair 'make up'? How would you structure it?

Should the gentleman ask for it?
Should the lady simply tell him what she will do to make it up?
If her excuse was good, couldn't find a babysitter or something, is it then forgivable?

I'm not going to make a suggestion, just get a census of the respectable ladies here!

Thanks!