Detailed 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
Problem:customer: Hello, I am Shirley Scott. 
 agent: Hello, how can I assist you now? 
 customer: Owing to an emergency I would like to cancel my recent reservation. Can you help me in doing cancellation? 
 agent: Sure, I will help you with that. 
 customer: Ok. 
 agent: Please wait, while I check for your reservation. 
 customer: Sure. 
 agent: Thanks for waiting, sorry you inform you there is no any reservation found on your name. 
 customer: Ok, no issues. Thanks for your information. 
 agent: Thank you for reaching us, have a great day.
Solution:
no_reservation