Can I take a message?

Sample conversation:

B= Mark A= Dinesh (roommate)

A: Hello.
B: Hello is Dinesh there please?
A: No, he’s not here right now.
B: This is Mark, Dinesh buddy from the army.
A: Oh.Hi Mark.
B: Do you happen to know where he went?
A: He said he was going to the library to study.
B: Do you know when he’ll be back?
A: He told me he would be back by 6:00.
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.