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: Hello, Robert Walker here. 
 agent: Hello, how may I assist you? 
 customer: I am planning to travel from Minneapolis & St. Paul MN-MSP to Chicago IL-ORD. Can you please help me to book a flight ticket? 
 agent: Sure, may I know your travelling dates, please? 
 customer: Yasure. My depart is on 06/24 and returning is on 06/26. 
 agent: Do you have any connection limit? 
 customer: Ya one single connection. 
 agent: Thanks for giving your details, we found a flight on your details with airline Frontier, flight number: 1003. Shall I proceed for booking? 
 customer: OK. 
 agent: Your ticket has been booked. 
 customer: Thank you. 
 agent: Thanks for choosing us, have a nice day.
A:
book