What are the speakers discussing?

M:(68)How many people have registered for the Western Civilization class this semester?
W: So far, 32 students have registered. That’s a bit more than I expected. The classroom will only hold 40 students, and enrollment is open for another week. The class is only offered in the spring and I’d hate for some students to be turned away.
M:(69)You should check with the department head and see if he’d be willing to let you use another room and increase the class size. He’s fairly flexible on matters like this.
W: I think you’re right.(70)Do you happen to know what his office hours are? I’d like to stop by and speak with him in person.