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 Kimberly Lee. 
 agent: Hello, how may I assist you today? 
 customer:  I want to cancel my reservation owing an emergency. Can you please help me cancelling my reservation? 
 agent: Sure, I will help you. 
 customer: Ok. 
 agent: Sorry, there is no reservation found on your given name. 
 customer: Thank you for your help. 
 agent: Thanks for choosing us.
A:
no_reservation