What should you say? Ask her how she is, how her vacation was, and stuff. Get her talking about herself. Show her you are interested in her interests, what she is interested in.
Ask beforehand about who pays, so you are both clear. If she independent minded she might be offended if you try to pay right at the door. If she knows in advance it's your shout, then that would be different.
Yes, you're lame, Blaze, not to have called before this. IMO, anyway.
Good to see you are not giving up, though!
Good luck. Don't lose any more numbers!
Cheers
Mick