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 Samantha Hill. 
 agent: Hello, how may I assist you for today? 
 customer: Due to my health issue I want to cancel my recent reservation, so can you please assist me with this? 
 agent: Sure, please wait a moment I will check your reservation details and get back to you. 
 customer: Sure. 
 agent: Sorry, I regret to say that there is no reservation found under your name. 
 customer: No problem, thank you for the information. 
 agent: Thank you for choosing us, have a nice day.
A:
no_reservation