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, I'm Joseph Williams. 
 agent: Hello, how I help you? 
 customer: I have a board meeting to attend at Boston, MA - BOS. So, I would like to book a ticket from Las Vegas. 
 agent: OK, please help me with your journey details? 
 customer: My travel dates are from 08/13 to 08/15. Price limit of 1000 and connections limit of 1 are my other restrictions. 
 agent: Ok, please provide me  your origin airport code? 
 customer: My Origin airport code is NV - LAS. 
 agent: Ok, please wait I will let you know. 
 customer: Sure. 
 agent: Thanks for waiting. We found a flight matching with your requirements. 
 customer: Excellent. 
 agent:  Airline is JetBlue with flight number 1001. 
 customer: OK. 
 agent: Price of 100 with single connection. Can I proceed for booking? 
 customer: Yes, Please proceed with the ticket booking. 
 agent: Your ticket is confirmed. Have  a safe journey. 
 customer: Thank you, For helping me to book a ticket.
A:
book