There are only two reasons a provider will turn you down:
1) She is laready in a session
2) Some alert flag goes up for her . . . .and it may not actually be you.
Other than that, a provider is a "sure date"
When you ask someone out in real life, her response is real—and yeah, it IS youi.
Be confident—be bold. The worst she can do is say "No!" How bad is that really?