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. 
 agent: Hello. 
 customer: My name is Michelle Allen. 
 agent: How may I help you today? 
 customer: Owing to an emergency, I want to cancel my recent reservation. Can you help me in cancel reservation? 
 agent: Sure, please wait for a moment. 
 customer: Sure. 
 agent: Sorry, there is no reservation found basis on your details. 
 customer: Ok, no problem. Thank you. 
 agent: Thank you for reaching us.
A:
no_reservation