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. 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. 
 customer: I am Sandra Evans. 
 agent: How can I assist you today? 
 customer: I want to change my travel dates in my previous reservation, can you please help me with that? 
 agent: Sure, please give me a moment. 
 customer: Ok. 
 agent: Thanks for waiting, there is no reservation found under your name. 
 customer: Oh! May be I am not booked my ticket properly at that time. Thank you for your service. 
 agent: Welcome, have a great day.

Output: no_reservation


Input: Consider Input: customer: Hi. 
 agent: Hello, how may I help you? 
 customer: Unfortunately I have an emergency meeting so I want to cancel my reservation, can you please help in cancelling my reservation? 
 agent: Sure, I will help you. 
 customer: Thank you. 
 agent: May I know your good name please ? 
 customer: I am Emma Young. 
 agent: Please wait for a while. 
 customer: Ok. 
 agent: Sorry, there is no reservation found on your given name. 
 customer: Ok, no problem. Thank you for your quick response. 
 agent: Thanks for choosing us.
Output: no_reservation