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 best I can aid you at present? 
 customer: I am Dennis Young, want to cancel my reservation. Can you please help me? 
 agent: Sure, I am glad to help you. Please allow me a few minutes to check the reservation. 
 customer: Sure. 
 agent: Thank you for waiting, no reservation was found on your name to cancel. 
 customer: It's ok, thank you. 
 agent: Thank you for visiting us.
no_reservation