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
Q: customer: Hello. 
 agent: Hello. How may I help you today? 
 customer: Myself Christine Clark. 
 agent: Nice to meet you Clark. 
 customer: I am planning a small weekend trip to DFW, can you help me in booking a ticket from HOU? 
 agent: Sure, let me know your travelling dates please. 
 customer: I am planning this trip on 02/26 and my return will be on 02/28. 
 agent: There is a flight available for you in Southwest airline with 1 connection. Shall I proceed with the booking? 
 customer: That's good, please proceed. 
 agent: Ok, your ticket is confirmed with the flight number 1001. 
 customer: Thank you for your help. 
 agent: It's my pleasure to help you.
A:
book