Detailed Instructions: 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: Hi. 
 agent: Hello. How may I assist you today? 
 customer: Can you please book a ticket on 06/30? 
 agent: Sure, may I know your return date? 
 customer: I intend to return on 07/02. 
 agent: Please let me know your source and destination points. 
 customer: Denver, DEN is my Source to Chicago, ORD is my destination. 
 agent: Is there any connection limit? 
 customer: Yes, I need to travel with one halt in between my journey. 
 agent: Thanks for giving your journey details, we found a Jet Blue airline matching airline with one connection and the price 200. 
 customer: Ok. You can proceed to book. 
 agent: Your booking has been confirmed. May I know your name please? 
 customer: Thank you.
A:
book