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. How can I help you? 
 customer: I am Gregory Allen. I want to attend a live music concert in EWr, can you please find a flight from ORD? 
 agent: Sure, I will help you to book a flight. Can you please share me your travelling dates? 
 customer: I want to start my journey on 10/10 and my return will be on 10/12. 
 agent: Please hold on for a moment. 
 customer: Ok, take your time. 
 agent: Here, I found a flight for you with single connection. Shall I proceed for booking? 
 customer: Please proceed. 
 agent: Your ticket is booked with flight number 1000 and airline is Southwest. 
 customer: Thank you for booking.
A:
book