What are they quarrelling about?

M: What are you doing?
W: I’m parking my car here.
M: No, I’m sorry. It’s impossible.
W: Why not? I don’t see a "No Parking" sign.
M: This is my parking place.
W: I don’t see a sign with your name.
M: I park here every day.
W: Well, I’m parking here today.