Definition: 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: Can you please make a reservation from PHX to EWR to attend a conference in New York? 
 agent: Sure, could you please share your departure and arrival day? 
 customer: My depart and arrival dates are, Aug 6th and 8th. 
 agent: Ok, could I have your name please? 
 customer: My name is Carolyn Martinez. 
 agent: Ok, do you need direct or connecting flight? 
 customer: I need a connecting flight. 
 agent: Ok, do you have any other specifications? 
 customer: No. 
 agent: The economy class with flight number 1028 of American Airline is available having fare as 100 and connection as 1, is it ok for you? 
 customer: Ok, proceed with this airlines. 
 agent: Ok, your reservation is confirmed. The departure time is 14:00 hours and the arrival time is 0:00 hours. 
 customer: Thank you for your help. 
 agent: You are welcome, have a great day.
Output:
book