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 help you at present? 
 customer: Can you please help me to change my reservation to other dates? 
 agent: Sure, I am here to help you to change it. 
 customer: Thank you. 
 agent: May I know your name please? 
 customer: Sure, my name is Jerry Hill. 
 agent: Ok, please wait for a moment. 
 customer: Sure. 
 agent: Sorry to say that, there was no reservation found on your name to change it. 
 customer: No issues, thank you. 
 agent: Thank you for reaching our service.
Output:
no_reservation