Provide the theme summaries for the following conversation: 

Everett: have you see tristan lately?
Emily: i haven't
Everett: i wonder what he's been up to
Emily: i hear he has a new job that has been keeping him crazy busy
Everett: we should go out with him soon
Emily: yeah he's a nice fun guy, let's get in touch with him
Everett: i lost his number though
Emily: don't worry, i'll set something up

Summary: 
Everett and Emily want to get in touch with Tristan, who's been lately very busy in his new job. Emily will contact him because Everett doesn't have his number.