Detailed Instructions: 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, I am Anna Miller. 
 agent: Hello. How may I be of your service? 
 customer: Owing an emergence, I want to cancel my recent reservation. Can you help me with it? 
 agent: Sure, I'll help you with this. Please wait a moment I will check and let you know. 
 customer: Sure. 
 agent: Thanks for waiting, we did not found any reservation by this name. 
 customer: Ok, no issues. Thanks for the help. 
 agent: Thank you for choosing us.
A:
no_reservation