You will be given a definition of a task first, then some input of the task.
In this task you are given a small conversation between two persons and 4 options on how the conversation should continue. Your job is to choose the most reasonable option. The conversation and the options are separated by a newline character. Each dialogue in the conversation are separated by a comma. F and M indicate female and male, respectively.

F: I can't find the starting time for the Shanghai to Beijing train on this schedule. ,M: Look for Shanghai in the left hand column and follow it across until you find the our listed in the Beijing column.
(A) F: I am afraid I did not quite catch what you were saying. Please repeat it. (B) F: OK, thank you. I'm looking for a train from Beijing to Shanghai. (C) F: I've been looking for a train schedule. You don't have one? (D) F: Since you don't have a schedule, I'm looking for maps of Beijing and Shanghai.
Output:
A