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. Myself Andrew Garcia. 
 agent: Hello, how may I help you? 
 customer: Due to sudden plan in my business.I want to cancel my reservation. 
 agent: Sure Andrew, please wait for a moment. 
 customer: Ok. 
 agent: Sorry Andrew, there is no reservation found on your name to cancel your reservation. 
 customer: Ok, thank you for your information. 
 agent: Thank you for contacting us. You are welcome.
A:
no_reservation