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 aid you now for the day? 
 customer: I am Shirley Rodriguez. I want to book a flight ticket for birthday shopping in Dallas, could you help me in booking a flight ticket? 
 agent: Ok. Help me with your journey dates. 
 customer: I would like to fly on 01/27 and return on 01/29. 
 agent: From which place you would like to travel? 
 customer: My source is Boston, MA - BOS and destination code is TX - DFW. 
 agent: Thanks for waiting. There is a flight with 1 connection of price 100 in Southwest airline. 
 customer: You can proceed to booking. 
 agent: Your reservation has been done. 
 customer: Thank you. 
 agent: Thank you for reaching us.
A:
book