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, kindly mention your name. 
 customer: Sure, Kenneth Brown is my name. 
 agent: Ok, how can I amend you today? 
 customer: Due to sudden rainfall at my source, I want to cancel my recent reservation. Can you please help me with this? 
 agent: Sure, please wait for a moment to check with the status of your reservation. 
 customer: Sure. 
 agent: Thanks for your time, there was no reservation found on your name. 
 customer: Ok. Thank you for your service. 
 agent: Thank you for opting us.
Output:
no_reservation