Where probably are the speakers?

W: Can I help you?
M: Oh, I’m just looking, thanks. Well, actually, I’m looking for something for my girlfriend.
W: And what sort of thing are you looking for?
M: I don’t really know. A dress?
W: Right. What color does your girlfriend usually wear?
M: Oh, dear…
W: OK, what color are her eyes?
M: Green.
W: Right, purple suits people with green eyes. Now, what size is she?
M: Um, well, sort of, she isn’t very big, but she’s not particularly small. That’ll be medium then.
W: Well, we have this rather nice silk evening dress here…
M: Good, I’ll take it. Thank you. How much is it?
W: That’s 70 pounds, sir. How would you like to pay?
M: Seventy? By credit card, please.
W: Fine. If you could just sign…
M: Here you are. Goodbye.