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: Consider Input: customer: Hello,. 
 agent: Hello. 
 customer: I am Kenneth Harris. 
 agent:  How can I help you? 
 customer: I want to change my existing reservation due to some issues, can you please help me with that? 
 agent: OK, please wait I will revert you. 
 customer: Ok. 
 agent:  Sorry, no reservation was found on your name. 
 customer: Ok, no issues. 
 agent:  Thank you for availing us. 
 customer: Thanks for your information.

Output: no_reservation


Input: Consider Input: customer: Hello. 
 agent: Hello. How can I assist you today? 
 customer: I want to cancel my ticket due to dense fog in my place. 
 agent: Sure, may I know your name to check for the previous reservation? 
 customer: Brandon Collins here. 
 agent: Please allow me a moment. 
 customer: Sure. 
 agent: There is no reservation found under your name. 
 customer: No problem, thank you. 
 agent: Thank you for contacting us.

Output: no_reservation


Input: Consider Input: customer: Hello. 
 agent: Hello. How can I assist you? 
 customer: My plans to visit Washington Entrepreneur summit has been postponed, I would like to change my existing reservation. 
 agent: May I know your name? 
 customer: My name is Mary Carter. 
 agent: Sorry, there is no reservation found. 
 customer: Ok, no issues. 
 agent: Thank you. 
 customer: Thank you for your help.
Output: no_reservation