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
Input: customer: Hi. 
 agent: Hello, how may I abet you? 
 customer: Catherine Hall here, please cancel my reservation which I have done previously. 
 agent: Sure, may I know your good name? Thank you for providing your name, please hold on. 
 customer: Sure, I will wait for your response. 
 agent: No reservation found on your name. 
 customer: It's ok, thanks for your information. 
 agent: Thank you for choosing us, have a nice day.
Output:
no_reservation