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 address you? 
 customer: I planned to meet my friend in OAK, can you please help me to book a flight ticket from EWR? 
 agent: Sure, on what dates are you planning to travel? 
 customer: I prefer to travel on Feb 19 and Feb 21. 
 agent: How many connections do you need? 
 customer: I prefer to travel in a connecting flight. 
 agent: Is there any other requirements? 
 customer: I would like to travel in normal cost airline. 
 agent: Please forward me your name. 
 customer: I am Ronald Gonzalez. 
 agent: Delta airlines with flight number 1005 going on your way with 1 connection and the fare is 200. Is that fine? 
 customer: Ok, please confirm my booking. 
 agent: Your booking has been confirmed. 
 customer: Thank you for your help. 
 agent: Thank you for reaching us.
A:
book