I wasn't sure if this should go under the "Advice"-forum since I need advice, but I thought the Advice-forum was more for advice on magic props and stuff.
Anyway, yesterday I was performing magic for some people I hardly knew, and they really enjoyed it and then I did the Ambitious Card Routine and I asked some girl to sign the card and I jokingly said "and put your cellphone number on there while you're at it". Most people don't do that but she wrote her number down anyway and I continued with the effect and after the ACR I did a couple of other tricks.
As this group was leaving, the girl who signed the card asked what she should do with the card and I said "Keep it, as a souvenir" and she insisted "no you keep it, because then you have my number"
It's not the first time someone has written down their phone number as they signed the card, but it was like, the first time someone "pointed it out", like "allowed me" to keep it.
What should I do? Should I call her? Text her? her phonenumber is... no just kiddin

But has anyone been in the same situation? what did you guys do?
cheers!