Tramp said:
What do I say to this text, if our date went good (no kissing no sex) and she knows I'm leaving out of town soon
"I had a great time with you. If I didn't have to get up early, I would have asked you to stay longer. I hope we can meet again someday.<3"
Hmm, if you didn't have sex or kiss, it sounds like it might be a stretch to say the date went well, especially if this was your only shot (which it looks like it was) before you leave town.
To me this looks like a situation with maybe a 4% chance of recovery, if, that is, you're looking to be more than friends (if that's what you want I'd say you have a much better shot). This text seems to indicate that the power is in her court, and she's gently yet firmly placing you in the friend zone. That "someday" can probably be read as "pretty much never unless we randomly bump into each other after at least a few months", if your circumstances are what I suspect them to be.
As to what to say, it depends on what you want and the past precedence you set with your previous actions. How sexually charged was the date?
Assuming you want to text her back at all (which, if you're coming back, it might be better just to start from scratch), you should probably dismiss the fact (through an ambiguous joke or something) that you left because she had more important things to do the next day (implied) and then quickly move on to setting up a follow-up date (if that's what you want). Something like this maybe:
"[Girl's Name]! Yeah, good thing too...

Btw, do you know what day today is?" (bait her to give you more leverage. I dislike such tactics in general, but if I wanted to try and set up another date I'd want to get some more leverage first, based on the limited info I have to go on here)
This is where I'd like to see that go:
Girl: "Uh... your birthday?"
You: "Nope. If I'm not mistaken, it's actually Someday

I'm making pasta for dinner. Are you more of a linguini or pennoni girl?
Girl: {she bites andchooses pennoni (a short fat noodle) -- maybe logistics set up here too} ...
You: "Oh, so you like a wide, thick noodle eh... Interesting..."
Girl: "Haha, are you saying you have a chode?"
You: "Pssh, you wish baby..."
You: "I actually only have cannelloni in my drawers... Oh, and on your way could you grab some eggs. I'm going to make my special sauce."
In these situations, if you're not just going to let things settle (which in that case a generic: "Yeah [girl's name], glad meeting you too

" kind of texts will suffice) I would just play around and experiment a bit. Convey that you don't take anything seriously.
Hope that helps.
-Oskar