Where are they talking probably?

W: Time to get up, dear.
M: Yes. Mary, open the window to let fresh air in, please.
W: All right. Look, who’s that man with the black bag, Jack?
M: I can’t see a man with a black bag.
W: There, on the street corner.
M: Oh, that man. I don’t know who he is. He’s a stranger.
W: A stranger? But he’s been about here for weeks.