If you meet people in your dreams, ask them their names and favorite color, favorite number, birthday, etc. and also try to take note of the names of the places you encounter.
For they are all parts of your Mind; figments of your imagination or, perchance, genuine astral experiences.
I wonder what could be learned from such mysterious rendezvous.
I know I've written music that I heard in a dream. I like it. It pushes my bounds of familiarity while still being wholly of my own creation.