Definition: 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 can I aid you? 
 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: Sure, can you please let me know your name to cancel? 
 customer: Amy Hill here. 
 agent: Sorry, there is no active reservation found under your name to cancel. 
 customer: That's ok, thank you for your help. 
 agent: Thank you for reaching us.
Output:
no_reservation