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 want to cancel my recent reservation, can you help me in that? 
 agent: Sure, I am here to help you in cancelling your ticket. May I know your name to cancel? 
 customer: Sure, myself Amy Taylor. 
 agent: Please wait a moment. 
 customer: Sure, I will wait for your response. 
 agent: Thank you for waiting. 
 customer: My pleasure. 
 agent: Amy Taylor, your reservation is found in our database and it is cancelled. 
 customer: Thank you for the service. 
 agent: Thank you for reaching us.
Output:
cancel