Task: Dialogue Generation
Input (English): M: I'm going to play volleyball with Lily, would you like to join us? ,F: I'd love to, but I promised to go swimming with Kathy.
(A) M: Since you won't go swimming today, why not go volleyball with us? (B) M: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (C) M: That's great. Let's go and play volleyball together now. (D) M: That's great. Let's go skiing together now.
Output (English): B