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. 
 agent: Hello, how may I guide you for today? 
 customer: I am David Jones. I would like to book a ticket from JFK to HOU, can you please help me out? 
 agent: I am happy to help you about your flight ticket booking. Can you please provide your planned dates of journey? 
 customer: I am travelling on these dates 04/17 and 04/19. 
 agent: Delta airline is providing a flight which costs 100 with a single connection limit. Would you like to book this flight? 
 customer: Ok, you can proceed with this flight. 
 agent: I have booked your flight ticket with the flight 1025. Most welcome, thank you for opting our service. 
 customer: Thank you for your services.
A:
book