When does this conversation take place?

M: Hey, Helen, how are you?
W: I’m fine, Bob. Arch’t you glad the semester is over?
M: Are you going to the rock concert Friday night?
W: I haven’t thought much about it. Are you?
M: Sure. Would you like to go with me?
W: Sounds like fun.
M: You’11 have to buy your own ticket though.
W: Are you broke again? Let me treat you. You know I am a waitress at the student center. Anyway now that the final exams are almost over, I’d love a night out.
M: Since you’ve been so great about buying the tickets, why don’t I take us out to dinner?
W: You’ve got a deal. Let’s buy the tickets now.