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, myself Nicole Campbell. 
 agent: Hello Nicole, how may I help you today? 
 customer: I am planning to book a flight ticket to IAH from IAH, can you please help me out? 
 agent: Sure, may I know your dates of journey please? 
 customer: Sure, my planned travelling dates are 01/28 and 01/30. 
 agent: Please wait for a moment. 
 customer: Ok, take your time. 
 agent: There is a flight with the connecting flight of fare 100 and the airline is AA, are you ok with this booking? 
 customer: Ok, please confirm my reservation. 
 agent: Ok, the flight with the number 1021 has been reserved. 
 customer: Thank you for the help. 
 agent: You are welcome, have a safe flight.
Output:
book