Task: Dialogue Generation
Input (English): F: Can I help you, sir? ,M: I want to buy a hat like this in grey, but there are only a white and green ones.
(A) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (B) F: The green hat you want really suits you. (C) F: OK, sir. I'm going to find a grey hat for you. (D) F: Sorry, we have red and white hats like this at our store, but the grey hats you want have been sold out.
Output (English): C