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 Nancy Taylor. 
 agent: Hello. How can I serve you? 
 customer: Due to some emergency I need to cancel my recent reservation can you please help me in cancelling my reservation. 
 agent: Sure. Please wait a while. 
 customer: Sure. 
 agent: Thanks for your time. We didn't found any reservation by this name. 
 customer: No problem. Thank you for the information. 
 agent: Thank you for choosing us.
A:
no_reservation