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: Hi, I am Larry Green. 
 agent: Hello, how can I help you? 
 customer: I need to schedule my holiday trip at Chicago, IL-ORD to have a fun at Navy pier, can you please help me to book a flight ticket from Charlotte, NC-CLT? 
 agent: Sure, please share me your travelling dates? 
 customer: I will depart on 11/09 and I intend to return on 11/11. 
 agent: Do you have any specifications? 
 customer: Yes, I need a break within my journey. 
 agent: Please wait for a minute. 
 customer: Sure. 
 agent: Thanks for waiting. We found a 1000 Spirit airline with single connection and price of 100. Shall I proceed with booking? 
 customer: That's perfect, you can book the ticket. 
 agent: Your ticket has been booked. 
 customer: Thanks for your assistance. 
 agent: Thank you for reaching us.
A:
book