Ask for their name, then they'll get sad and tell you their first name.
Then say: "No, no, I meant your last name"
They'll feel a little better and tell you their last name.
So now you have their first and last name :)
This literally happened to me, like, an hour ago.
I told her, "I have a name, you know" but then when she and her friend were introduced to me I didn't ask which was which and had to guess...
I'd be like ,,Hey, bro, you know what II think? *insert random name here* would really suit you! I think I'll call you like this!'' They would say yes or be like - Nah, *insert real name here* is okay.
Then say: "No, no, I meant your last name"
They'll feel a little better and tell you their last name.
So now you have their first and last name :)
I told her, "I have a name, you know" but then when she and her friend were introduced to me I didn't ask which was which and had to guess...