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 assist you today? 
 customer: I need to visit Austin, can you please book the ticket from DTW to AUS? 
 agent: Sure, may I know your planned travel dates? 
 customer: Sure, my planned departure and return travel dates are 12th and 14th of Dec. 
 agent: Do you have any limits on number of connections? 
 customer: I need direct flight only. 
 agent: Do you have any another specifications on your journey? 
 customer: No, I don't have any other specifications. 
 agent: May I know your name for the booking? 
 customer: My name is Barbara Young. 
 agent: JetBlue Airlines providing a flight with the price 200 with 0 connection. Can I proceed for the booking? 
 customer: That's fine for me, you can proceed for booking the ticket. 
 agent: Your flight ticket reservation done with the flight number 1002. 
 customer: Thank you so much for your help. 
 agent: Welcome, thank you for opting us.
Solution:
book