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: Hi. I am Donna Nelson. 
 agent: Hello, how can I guide you at this moment Nelson? 
 customer: I need to cancel my reservation for a client meeting but I have got a sudden call from my friend that one of my friend got met with an accident so I feel to cancel my reservation. Can you please help me out? 
 agent: Yes, I will try my best in cancellation of your reservation. I have found a reservation under your name in our booking list. As per your request, I have cancelled it. 
 customer: That's ok, thank you for your help. 
 agent: You are welcome, thank you for reaching out here. Hope you have a nice day ahead.
cancel