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 can I assist you? 
 customer: Can you book me a ticket from SEA to DCA? 
 agent: Sure, can you please let me know your dates of travel? 
 customer: I need to reach my destination by Sept 19th as I have a party meeting next day and will come back on Sept 21. 
 agent: Do you have any connection limit? 
 customer: Yes, I need 1 lay by. 
 agent: Any other specifications to be met? 
 customer: I would like to travel in a normal cost airline. 
 agent: Ok, please wait a minute. 
 customer: Sure. 
 agent: We found an airline AA with flight 1001 having a fare 200 with stopover. 
 customer: Fine, please proceed. 
 agent: May I know your name? 
 customer: I am Sarah Hall. 
 agent: Your booking has been processed. 
 customer: Thanks for your support. 
 agent: Thank you.
A:
book