Q: In this task, you are given a conversation between a flight agent and the customer. You are given 4 options and you need to select the goal of the conversation. It is provided as part of customer's context, which has to be one of the following: `book`: Make a new reservation, `cancel`: Cancel an existing reservation, `no_flight`: No flight found for the customer's preference, `no_reservation`: No reservation / No change / No cancellation was made in the conversation, mostly enquiring details
customer: Hello. 
 agent: Hello, how may I help you? 
 customer: I am Andrew Barker. I am planning to book a ticket from DFW to DTW. Can you please help me out to book a ticket for me? 
 agent: Sure, may I know your travelling dates? 
 customer: I am planning to travel on June 17 and return back on June 19. 
 agent: Ok, let me know your connection limit. 
 customer: I am looking for a connecting flight. 
 agent: Do you have any other specifications? 
 customer: Yes, my depart time is evening. 
 agent: Here I found a connecting flight-1007 in a economy class, shall I proceed? 
 customer: That's fine, please proceed the booking. 
 agent: Ok, booking is done on AA airlines. 
 customer: Thank you for your service. 
 agent: Thanks for choosing us.
A:
book