Instructions: 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. I am Ryan Taylor. 
 agent: Hello, how can I assist you now? 
 customer: I need to cancel my recent reservation, as my business meeting with my clients got cancelled. Could you help me in cancelling my recent reservation? 
 agent: Sure, I would be happy to help you. Please wait for a while. 
 customer: Ok. 
 agent: Sorry there is no reservation found on your name. 
 customer: Ok, no issues at all. 
 agent: Thanks for choosing us and have a great day. 
 customer: Thank you for your service.
Output:
no_reservation