Not sure about that hunni. With me, that would not constitute a booking ...
If I ask someone to ring me back later to confirm the appointment, it means obviously the appointment wasn't confirmed in the first place.
If I am sure that I will be available at that particular time, I confirm it then and there and I don't need any calls in advance to confirm it.
(This is a good system to avoid time wasters but if the escort is a little busier then usual, she could miss those confirmation calls and then the client would think the appointment is off.)
This is just me BTW, other girls could work differently, so don't take my word for it entirely.
Anyhow, seeing you had the best intentions to follow up, it is a little unfortunate that she didn't see it that way.
Maybe she had a bad day, with lots of people wasting her time, this happen a lot lately
Maybe you can try one more time, give her a chance to explain and also service you???