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, how may I assist you? 
 customer: I am planning to visit Seattle, SEA, can you find a flight ticket from PHX? 
 agent: Sure, what date will you be travelling? 
 customer: I am willing to travel in these dates: 05/27 and 05/29. 
 agent: Please, wait a moment let me check the best flight to you. 
 customer: Ok. 
 agent: There is a flight in our airline with flight number 1004, and AA airline. Can I proceed it? 
 customer: If the connection limit is 1, then go ahead with booking. 
 agent: Yes, it is with 1 connection limit. Your ticket has been booked successfully. 
 customer: Ok, thank you for aiding me. 
 agent: Thank you for reaching, have a great service with AA airline. May I know your name? 
 customer: Thank you. My name is Kimberly Johnson. 
 agent: Thank you Johnson.
Output:
book