Definition: 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.
Input: F: Excuse me, do you offer air flight reservation service here? ,M: Yes, is there anything I can do for you? ,F: I want to book tickets for Canada. How many flights are there each day? ,M: 4, at 6:30 am, 8 am, 2:30 pm and 6:30 pm. ,F: What's the airfare? ,M: 8000 Hong Kong dollars including security insurance. ,F: May I have any discount for 5 persons? ,M: Yes, 10%. ,F: OK, 5 tickets for the 6:30 pm flight.
(A) M: One ticket is 900 Hong Kong dollars, a total of 45,000 Hong Kong dollars. (B) M: OK, because there is no discount, you need to pay a total of 36,000 Hong Kong dollars. (C) M: OK, here are four tickets you need, a total of 40,000 Hong Kong dollars. (D) M: Excuse me, could you repeat the question?

D