Q: 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
customer: Hello, I am Sharon Green. 
 agent: Hello, how best I can help you? 
 customer: Owing to an emergency, I want to cancel my reservation. Could you help me in the cancellation? 
 agent: Surely, I will help you out. Please wait for a few minutes. 
 customer: Ok. 
 agent: Thank you for waiting, no reservation was found on your name to cancel. 
 customer: Not an issue. Thank you. 
 agent: Thank you for availing us, have a nice day.
A:
no_reservation