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. I am Christine Brown. 
 agent: Hello. How can I help you? 
 customer: I want to attend my friend's wedding in New York.Can you help me to book a flight ticket from PHX to LGA? 
 agent: Sure, please tell your travelling dates? 
 customer: I want to depart on 01/12 and return by 01/14. 
 agent: Delta airlines is available with 1 connection and ticket price is just 200. Shall I proceed with it? 
 customer: Please book this ticket for me. 
 agent: Your reservation is confirmed with flight 1004. 
 customer: Thank you for helping me out. 
 agent: Thank you and have a nice day.
A:
book