Can i take a message?

A: Hello.
B: Hello. Is Yoon there please?
A: No. he´s not here right now.
B: This is Mark, Yoon´s friend from middle school.
A: Oh. Hi, Mark.
B: Do you know where he went?
A: He said he was the store to pick up grocer.
B: Do you know when he´ll be back?
A: He told me he would be back by 5:00 o´clock.
Can I take a message?
B: Yes. Please tell him there´s a party tonight.
And could you tell him to call me when he gets in?
A: Sure. Does he know how to get a hold of you?
B: I´m at Harold´s Department Store right now.
My number is 250-684-3234.
A: I´ll right. I´ll tell him you called.
B: Thanks a lot. Bye.