What’s the probable relationship between the two speakers?

W: Friendship Department Store, may I help you?
M: Yes, could you tell me when the store closes today?
W: We close at 7:30.
M: I see. And when do you open?
W: Nine o’clock every morning.
M: Fine. Thank you very much.

W: We are going to the coffee shop. Aren’t you coming?
M: Sorry, I’m waiting for an important call. Maybe next time.
W: Ok, have a good day.