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: HI. 
 agent: Hello, how can we assist you? 
 customer: Due to heavy cyclone at my location, I'm unable to catch the flight. Can you please help me in cancellation of my ticket? 
 agent: Sure, we here to help you. Can you provide your name on which the ticket is been booked? 
 customer: I have booked the ticket on the name of Cynthia Lee. 
 agent: Ok Cynthia Lee, can you please hold on for a moment? 
 customer: Sure. 
 agent: As per the records there no reservation found on the name provided. 
 customer: That's ok, may be I have done a wrong booking. Thank you anyways. 
 agent: Thank you for choosing our agency.
Output:
no_reservation