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 can I guide you today? 
 customer: Can you aid me to book my ticket from IAH to LGA? 
 agent: Surely, I will help you out. 
 customer: Thank you. 
 agent: Kindly, share your planned dates. 
 customer: My trip dates are Sep 20 and Sep 22 respectively. 
 agent: Is there any class preference? 
 customer: I am comfortable with any class. 
 agent: Can I have your name please? 
 customer: Dorothy White here. 
 agent: How many connections you prefer in your journey? 
 customer: I prefer for single connecting flight. 
 agent: Do you have any other concerns? 
 customer: No other concern. 
 agent: Ok, please wait for a couple of minutes. 
 customer: Ok. 
 agent: There is a connecting flight with a fare of 100 found in 1012 American Airline, shall I proceed? 
 customer: Please proceed. 
 agent: Ok, your ticket has been confirmed in economy class. 
 customer: Thank you for the help. 
 agent: Thank you for choosing us.
A:
book