I liked the way you tried. I'm guessing that the idle chat wasn't anything special so she probably thought of you as just another guy.
Keeping in mind that she's basicly a hired gun you could have thrown in a neg or two. (disqualifying and getting her out of her routine) Also your conversation probably didn't build rapport or had some sort of escalation (kino,tension,attraction).
A phone number rejection is not always a reason to eject but it sure makes the game a lot harder because you lost value. You could have changed subjects and talked to her for a bit longer. Something like "that's a shame, you won't be eligible to win a beauty-spa weekend then. Did you know that 45% of the people lie on these things?". (or find something better, maybe with a neg in it)
If you're lucky you saved the conversation and after building attraction this time make it bodylanguagly clear that you're leaving (or make a false time constraint) and she might still say "give me that form, I'll fill it in".
Just thinking... hope it gave you some ideas.
_________________
Be always on the move, it looks dynamic!
