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. 
 agent: Hello, how can I help you? 
 customer: Unfortunately, I would like to cancel my reservation which is done recently, can you please help me in this condition? 
 agent: Sure, I will help you. 
 customer: Thank you. 
 agent: Please may I know your name? 
 customer: Sure, my name is Stephen Robinson. 
 agent: As per your request, the reservation on your name is cancelled. 
 customer: That's ok, thank you for your information. 
 agent: Thank you for choosing us.
cancel