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
Q: customer: Hi. 
 agent: Hello, how may I serve you at this moment? 
 customer: Owing to an emergency, I want to cancel my recent reservation. Can you help me in that? 
 agent: Sure, we are here to help you. 
 customer: Thank you. 
 agent: May I know your name please? 
 customer: Sharon Wright. 
 agent: Ok, please be on hold. 
 customer: Ok. 
 agent: Sorry, we could not find any reservation on your name. 
 customer: Ok, no problem. Thank you. 
 agent: Thank you for approaching us.
A:
no_reservation