As mentioned, the agencies don’t like when a client asks a bunch of questions and when they’re busy, they don’t have time to answer.
When I was booking regularly with agencies, I would tend to repeat a lot. Why? Because I never knew how it would go when booking a new girl. I was a regular, so I figured they’d give me some inside info when I wanted to book a new girl. But all I would get is that “yeah, she’s great”. So it would often be hit and miss when seeing someone new.
All that to say that is that it’s best to read reviews and try to book accordingly. Don’t ask a bunch of questions, accept the bad encounters and move on, and appreciate the good encounters. You’ll form your own opinion, you can’t really rely on most bookers for inside info.
If they feel that your a pain in the $ss, you’ll get less priority and it will be more difficult to book the popular girls during busy periods. So a quick text is best when booking (Is SP so-and-so available at this date/time, for x hours?).
And just go with the flow!