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: Hi. 
 agent: Hello. 
 customer: I am Christine Turner. 
 agent: How can I help you now? 
 customer: Would it be possible to cancel my recent reservation? 
 agent: Sure, please wait for a while. 
 customer: Sure. 
 agent: Sorry, there is no reservation found on your name. 
 customer: It's ok, thanks for checking. 
 agent: Thank you for approaching us, have a nice day.
A:
no_reservation