What do you when you forget the name of someone you just met, yet you have plans with them soon?

Look the digits up on the Net to see if a name is listed. Hopefully I remember part of the name or where the work/reside to help the search.

I’d start with an internet search of their phone number to see if it matches up to a name. If there is someone I know that also knows this person, they could be asked. Hopefully, when they call, they will say, “Hi, this is _____.” If all else fails, it’s best to just ask when the meeting takes place. It’s more uncomfortable for the person who has forgotten than it is for the other party.

Ask how do you spell your name. Then when they repeat their name, say “I meant your last name. I want to put it in my phone.”

Smooth….Real smooth.

You could always just call them, identify yourself, where and approximently when you met and explain your embarrassment at having failed to mark down their name when your received their number. Explain that you really wanted to see them again and ask if they would please remind you of their name. (Use this only if the google search for the phone number fails to help you.

“This is a hypothetical situation, really.”

sure, it is, @Blackberry.
When you meet up, you keep it super-over-the-top formal (smiling) and introduce yourself as if for the first time with a bow. She’ll prolly reciprocate with an introduction and a curtsy.

Send a text asking them for their spelling of their names so you can have correctly in your phone.

”...mulva?”

Nowt.
I mean, a simple “I didn’t get your name” seems fairly reasonable.

I would probably just be honest. I would say “We met the other day and I took your phone number. I really enjoyed our conversation but this is a little embarrassing, I forgot to get your name?”

Introduce them to someone and say this is my friend so and so.
Friend says hi nice to meet you, I’m sorry- I didn’t catch your name?

If you were with other people of course, or
@Neizvestnaya‘s approach would work.