Task: Dialogue Generation
Input (English): F: Can I help you? ,M: Yes, I'm looking for a sweater in a medium size. ,F: Let's see. Here is a nice white one. What do you think? ,M: I think I'd rather have it in blue. Oh no, the pink one. It looks better. ,F: OK. Here's pink in a medium. Would you like to try it on? ,M: OK. Yes, I love it. It fits perfectly. How much is it?
(A) F: This white sweater you choose is cheaper than others. (B) F: Let me check. Blue sweater in large size, $40, please. (C) F: I’m sorry, I don’t understand. Could you say it again? (D) F: We only have large-size pink sweater, so there's a discount.
Output (English): C