Obviously, its much better to send her a funny cool text saying who you are right after getting her number, such as:
Vip number, store with care
However, there are times where you don't text her because you forget to do so the night of. That makes it harder for you later...
To her, your number will appear to be just 10 digits on her phone. If this is the case, you should reference from your conversation to help her remember who you are. Also, opening texts should consist of something you both relate to that is funny.
If she still can't figure out who you are and asks you, I'm lost. Any advice on what to respond to raise value?