Lol, that's a tough one. Do you know if she is actually angry, or just playing around? Don't know your relation with the girl, so it's hard to say, but I'll give it a shot. It's just a bit of random bullshit but it might give you some inspiration:
- Oh my god.. I can't...stop thinking...about, whether you prefer 'this' or 'this' wine for our dinner tomorrow at 20.00
- I know ... what you did last summer...whoehahaha
- subconscious texting: sigh, I hope .. will be at the starbucks tomorrow at .....
If she doesn't respond, you can come up with something like: playing hard to get? / writing a loong love letter for me?
Good luck bro