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. I am Ryan Miller. 
 agent: Hello, how may I assist you now? 
 customer: I want to travel from MSP to EWR. Can you book a flight ticket for me? 
 agent: Sure, please share me your planned journey dates? 
 customer: I want to travel in the flight on July 07 and July 09. 
 agent: Please mention your connection limit? 
 customer: I want to have a connection of 1. 
 agent: Do you have any requirement related to booking? 
 customer: I want to travel in economy class. 
 agent: Please wait for a moment. 
 customer: My depart time will be in evening. 
 agent: Thank you for waiting, I found a connecting flight 1012 of airline Spirit, fare is 200, class is economy, depart flight is in evening and return flight is in morning. Shall I proceed with booking? 
 customer: Please proceed the booking. 
 agent: Your flight ticket has been booked. 
 customer: Thank you for your service. 
 agent: Thank you for visiting us, we hope see you again.
A:
book