Detailed Instructions: 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
Problem:customer: Hello. 
 agent: Hello, how may I aid you? 
 customer: I want to attend a Marriage in Oakland. Can you please help me for booking the flight ticket? 
 agent: Sure, I am here to help you. Can you please share your airport codes? 
 customer: My airport codes are IAD and OAK. 
 agent: On which dates you would like to travel? 
 customer: My travelling dates are Aug 30 and Sep 01. 
 agent: Do you have any connection limit? 
 customer: I need single connecting flight. 
 agent: May I know your class preference? 
 customer: I want to travel in business class. 
 agent: Do you have any other requirements? 
 customer: No. 
 agent: May I know your name to proceed further? 
 customer: My name is Melissa Clark. 
 agent: Ok, please be on hold. 
 customer: Ok, I will wait. 
 agent: There is connecting flight from JetBlue airlines with a ticket fare 400, which departs at 1:00 AM and returns at 3:00 AM, shall I proceed with booking? 
 customer: Please proceed. 
 agent: Your ticket has been reserved with the flight-1014 in business class. 
 customer: Thanks for helping me. 
 agent: Welcome, have a safe trip.
Solution:
book