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

Ex Input:
customer: Hello. 
 agent: Hello. 
 customer: I am Stephanie Campbell. 
 agent: How may I guide you today? 
 customer: My business meeting has been cancelled, could you please help me with cancelling my recent reservation? 
 agent: Sure, I will help you with that. Please wait for a minute. 
 customer: Sure, take your time. 
 agent: I am sorry to say that there is no reservation found. 
 customer: That's ok, not an issue. Anyways, thank you for the information. 
 agent: Thank you for reaching us.

Ex Output:
no_reservation


Ex Input:
customer: Hi. 
 agent: Hello, how may I aid you? 
 customer: Can you book a connecting flight to Oakland? 
 agent: Sure, could you please provide your willing dates to travel? 
 customer: My travel dates would be from 10/01 to 10/03. 
 agent: Ok, may I know the code of airport to search for the flight? 
 customer: I am planning a business trip and my airport codes are MCO to OAK. 
 agent: Ok, please wait a moment. 
 customer: Sure. 
 agent: Ok, there is a flight 1019 in AA airline matching your details with price 100. Shall I proceed? 
 customer: I am fine with this flight and you can book it. 
 agent: May I know your name to book the ticket? 
 customer: Nicholas Lee here. 
 agent: Ok, your booking is done. 
 customer: Thanks for your help. 
 agent: You are welcome.

Ex Output:
book


Ex Input:
customer: Hello. Myself Betty Anderson. 
 agent: Hello, how may I aid you today from my end? 
 customer: I want to change my existing reservation, can you help me? 
 agent: Sure, I am here to help you out. Please allow me a moment. 
 customer: Thank you. I will wait for your response. 
 agent: Sorry Betty Anderson, there is no reservation on your name in our data base. 
 customer: That's ok, no problem. Thank you for the information. 
 agent: Thank you for reaching us.

Ex Output:
no_reservation