Task: Dialogue Generation
Input (English): M: I haven't heard from my sister since last month. ,F: Don't worry Charlie letters from the United States can be slow sometimes.
(A) M: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (B) M: I wrote to my sister last month. (C) M: Are you expecting a letter from your sister? (D) M: Ok, I will expect the letter from her patiently then.
Output (English): D