Task: Dialogue Generation
Input (English): M: This is a beautiful hat. I saw you wearing it last week, didn't I? ,F: Oh, that wasn't me. That was my sister Jessie. She's in your class.
(A) M: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (B) M: Really? But how do you know Jessie is my sister? (C) M: Really? I haven't heard that you have a brother. (D) M: Really? But your classmate Jessie and you look very similar.
Output (English): A