Where does the conversation take place?

M: I want to send this package by first-class mail.
W: Do you want it insured?
M: Yes, for 50 dollars, please. I’d also like some stamps--a book of 22 and three airmail.
W: You’ll have to get those at the stamp window over there, next to general delivery.
M: Can I get money orders there, too?
W: No, that’s to the left, three windows down the hall.