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, how may I help you? 
 customer: Can you help me to cancel my reservation? 
 agent: Sure, please share your good name? 
 customer: My name is Steven Brown. 
 agent: Please wait for a while. 
 customer: Sure. 
 agent: Sorry, no reservation found on your given name. 
 customer: No issues, thank you for your time. 
 agent: Thank you for choosing us.
A:
no_reservation