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. How may I guide you today? 
 customer: Can you please help me in cancelling my recent reservation, as my FIFA match got cancelled. 
 agent: Sure, I am gleeful to help you with that. May I know your name please? 
 customer: Myself, Lisa Mitchell. 
 agent: Please wait for a while, let me check your previous reservation status. 
 customer: Ok. 
 agent: Thank you for waiting. There is no reservation found on your name in our database to cancel it. 
 customer: Ok, no issues. Thank you for opting us. 
 agent: Thank you for reaching us, have a great day.
A:
no_reservation