Emily one thing, how could i close off the conversation after one mail back say? would you say 'ok well look forward to hearing from you when you want a booking' or something similar?? and what if they reply again with more chat, would you just ignore them and risk them not booking again or do you find they do get back in touch even if you don't reply?
Well, with his first post-booking email or text, I'll make sure not to ask any continuing questions or respond to anything apart from direct questions. I'll definitely be sure to send something like, "Thank you! I had a great time, too :-) Looking forward to next time!" - really smiley and friendly, of course, because we don't want to be rude here! 99% of clients will completely understand your intent here and won't reply again, or will be fine if they reply again but you don't reply again.
If, however, they keep responding with flirty questions, or even casual questions, I tend to just leave it. Or I'll respond *one* more time with something really brief. Literally, "Thanks!". If they keep responding after that then I just assume that they're not interested in respecting my boundaries so I don't worry about losing them as a client.
Again, 99% of clients have no problem understanding that an escort isn't a girlfriend and isn't, therefore, going to correspond endlessly with him between bookings. This is why I find it easy to let the 1% of "confused" guys (i.e. guys not interested in respecting boundaries) go. It's definitely good to respond briefly but nicely once or twice - you don't want to be ignoring someone just because he told you he had a nice time! - but anything longer than that just leads down a path that you don't want to be going with the client.
All of the, "he just kept texting me and didn't stop!" complaints should actually be, "why did I continue replying to his texts?" questions, to be honest. Usually it's because you've assumed that responding to him would make him rebook but genuine paying clients don't tend to expect tons of correspondance between bookings, and even if a genuine guy did want that you'd end up feeling short changed since for his ?150 hour's booking he's actually getting about 5 hours a week of your time chatting as well. Not such a good hourly rate then!
If in doubt, check with yourself whether you're feeling a sense of dread at checking your phone/emails because there might be something from the boundary-pushing client there? If you're dreading hearing from someone, that's a good sign you should stop communicating with them!