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: Hi. 
 agent: Hello, how may I be there for you? 
 customer: I need to book a flight ticket from ORD to DEN, Can you please help me for booking? 
 agent: Sure, when are you planning to make your trip? 
 customer: I would like to travel on 01/31 to return on 02/02. 
 agent: Do you need an economy class or business class? 
 customer: I need a economy class. 
 agent: How many connections do you need? 
 customer: I need a connecting flight. 
 agent: May I know your name? 
 customer: Shirley Garcia. 
 agent: Ok Shirley Garcia, there is a Delta airline with flight number 1005 going on your way with 1 connection and price of 100. Shall I go with this? 
 customer: Ok, proceed for booking. 
 agent: Your booking has been confirmed in economy class. 
 customer: Thanks for your information. 
 agent: Thank you for reaching us.
A:
book