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 assist you? 
 customer: I would like to visit Charlotte Zoo with my family. Can you help me in booking a ticket from BOS to CLT? 
 agent: Sure, can I have your journey dates please? 
 customer: My preferred journey dates are 11/29 and 12/01. 
 agent: Please wait a moment. 
 customer: Ok. 
 agent: I found a flight for you in Frontier airlines with fare 100, can I book your ticket? 
 customer: Please proceed for booking the ticket. 
 agent: May I know your name please to book the ticket? 
 customer: My name is Nicholas Taylor. 
 agent: Ok, your booking is confirmed with flight number 1020. 
 customer: Thank you for your service. 
 agent: Thank you for contacting us.
A:
book