Task: Dialogue Generation
Input (English): M: What are you going to do, mom? ,F: I'm going to mend and paint the shelves in your bedroom today. ,M: Great, anything I can do to help? ,F: Yes, you can go to the shop and get me a new paintbrush. This one is too old. But before you do that, ask your father what he's done with the knife. I've looked everywhere for it. There was nothing in the toolbox, except this box of nails, which I lost a month ago.
(A) M: So you are looking for the knife. I think I may have seen it somewhere. (B) M: To be honest, the paint brush you are looking for was broken by me. (C) M: OK. I'll help you ask dad where is the knife before I buy you a new box of nails at the shop. (D) M: I’m sorry, I don’t understand. Could you say it again?
Output (English): A