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 may I aid you today? 
 customer: I would like to cancel my recent reservation, can you help me in that? 
 agent: Sure, I am glad to solve your concern in cancelling the flight ticket. May I know your name to check the reservation status on your name in our database? 
 customer: Sure, myself Joseph Scott. 
 agent: Joseph Scott, please allow me a moment. 
 customer: Sure, I will wait for your response. 
 agent: Sorry Joseph Scott, I can't help you in canceling the flight ticket because I didn't find any active reservation on your name in our reservation list. 
 customer: That's ok, no problem. Thank you for the information. 
 agent: Thank you for reaching us.
no_reservation