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
Input: customer: Hello. 
 agent: Hello, do you need any help from us? 
 customer: Will you help me in booking the flight ticket from DEN to LAS? 
 agent: Sure, could you please share your departure and arrival day? 
 customer: My travel dates are Aug 03 and Aug 05. 
 agent: Ok, could I have your name please? 
 customer: Myself James Martinez. 
 agent: Ok, do you need direct or connecting flight? 
 customer: I need a flight with single connection. 
 agent: The economy class with flight number 1005 of Spirit airline is available having fare as 100 and connection as 1, is it ok for you? 
 customer: I prefer to travel in major airlines, can you please help me with that? 
 agent: The economy class with flight number 1019 of American airline is available having fare as 100 and connection as 1, is it ok for you? 
 customer: Sure, you can proceed with the booking. 
 agent: Ok, your reservation is confirmed. The departure time is 8:00 hours and the arrival time is 11:00 hours. 
 customer: Thank you for your help. 
 agent: You are welcome, have a great day.
Output:
book