Where does the woman work?

W: Good morning, sir.
M: Good morning. I wonder if you can help. I’ve lost my coat.
W: Where did you lose it, sir?
M: Er... I left it on the.., urn.., underground yesterday morning.
W: Can you describe it?
M: Well, it’s a full-length brown overcoat with a check pattern on it. It’s got a wide belt, and one of those thick furry collars that keep your ears warm. It’s a very nice coat, actually.
W: Hmm. I’m afraid we haven’t got anything like that, sir. Sorry.
M: Well, to tell you the truth, I lost another coat last week on the bus. It’s a three quarter length coat — it’s grey, with big black button and a black belt.
W: Sorry, sir. Nothing like that.
M: And only this morning I left my white raincoat in a park. It’s got a silk lining...
W: Look, sir. I’m a busy woman. If you really need a coat so badly, there’s a very good second-hand clothes shop just round the comer.