Task: Dialogue Generation
Input (English): M: How much do I need to pay? ,F: Let me see. Um, $9 and $8. That's $17, sir. ,M: OK, here is a $20 bill.
(A) F: Thank you. Here's you change, $7. (B) F: You need pay $3 more. (C) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (D) F: Why did you pay $9?
Output (English): C