Yes I wrote to make a booking via AW during the week. She then let me know she was working this weekend. I then suggested that I couldn't manage the particular days she was working. She then offered another day that I was free. So that was great.
Then she texted me and we sorted things out via text.
Then I made a booking, which she confirmed. I thought that was quite good tbh.
I believe that she is a student and has a lot of other committements on her time, workwise and family etc. Which could explain why the OP hit a snag.
I am more of a relaxed punter and basically am not that bothered if things fall through, I gave her plenty of leeway and everything worked out well.
I will put up an HoN, in a week or so, as soon as I get time. Got a couple of others that I want to do as well.
Hope this helps