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: Hello. 
 agent: Hello, What kind of help are you expecting from our side? 
 customer: Can you please help me in flight ticket booking process from LGA to PHL? 
 agent: Sure, I am euphoric to help you with booking. May I know on which dates you are planning to start and return? 
 customer: Thank you for your response, I want to take off on Jan 22 and book my return ticket also on Jan 24. 
 agent: Do you prefer any way station in between journey? 
 customer: I will prefer 1 break in between my journey. 
 agent: May I know your good name please? 
 customer: Sure, my name is Betty Nelson. 
 agent: Is there any other specifications regarding your journey? 
 customer: I want to travel in economy class flight. 
 agent: Ok, please wait a moment. let me search a flight for you. 
 customer: Ok. 
 agent: Thank you for your time, we have found a American airline, flight number-1009, connections-1 and ticket-100. Would you like me to book the ticket? 
 customer: Please confirm this flight ticket for me. 
 agent: Sure, a seat has been reserved successfully for a economy class flight. 
 customer: Thank you for your help. 
 agent: Thank you for your presence. We hope to serve you again.
A:
book