I'll weigh in here, FWIW. Despite the fact that I am over 45, I am new to the business. At first, I was VERY upset every time I had a NoShowNoCall...I took it quite personally. Now, not so much. I recognise that some individuals like to chat and string a Talkative Tammi like me along. They will book an appointment then ask leading questions like "What kind of fantasies can we play out together...?" Don't waste my time telling me you want an appointment when all you're looking for is an entry in the spank bank. Admittedly, it tends to happen more in the cougar chasing youngun demographic. Seriously, all I need to hear the next day is "Sorry, I'm going to have to cancel because XYZ..." If it's plausible, and you seem like the sort of gentleman I enjoy seeing, I'll generally give you one more chance before I blacklist your sorry ass!
A lady always appreciates courtesy gentlemen!