First field report and first time I grew up a pair. Went out with my friends to have a drink. Saw a girl and decided to approach her. She was walking with her mother. I stop them and tell her that she looked cute and that I wanted to say hi. She looked very enthusiastic about that, so I asked her name. Turns out she was from my same country (I live abroad) and that she was going to leave on Wednesday. So I asked her what she was going to do on Monday and she answered that she was maybe going to a place far from here. I couldn't ask her to see me on Tuesday because I had another date planned. So I just left her walking with her mother without asking for her number. This morning ,the other girl told me she is sick and that she probably won't be able see me on Tuesday.... I'm a dumbass. TIL: Just ask the number, it doesn't matter if you are going to see her ever again or not. You can always delete it.