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, how may I aid you? 
 customer: I planned to meet my friend in HOU, can you please help me to book a flight ticket from DCA? 
 agent: Sure, let me know your trip dates please? 
 customer: I prefer to travel on Dec 28 and Dec 30. 
 agent: May I know your connection limit? 
 customer: I prefer to travel in a connecting flight. 
 agent: Do you need any other preference? 
 customer: No. 
 agent: Can I know your name please? 
 customer: I am Amanda Martin. 
 agent: Frontier Airlines is providing connecting flight with the ticket fare of 100 and depart time is 4:00 hours, arrival time is 6:00 hours. Shall I proceed? 
 customer: Ok, please confirm my booking. 
 agent: Your ticket has been confirmed by flight number 1005 and an economy class. 
 customer: Thank you for your help. 
 agent: thanks for choosing us.

Ex Output:
book


Ex Input:
customer: Hello. 
 agent: Hello, how can I help you today? 
 customer: I planned to meet my friend in PHL, can you please help me to book a flight ticket from LAX? 
 agent: Sure, I am here to help you in booking. Can you please share your travel dates? 
 customer: I prefer to travel on Apr 21 and Apr 23. 
 agent: Ok, please share your name. 
 customer: I am Barbara Carter. 
 agent: Let me know your connection limit? 
 customer: I prefer to travel in a connecting flight. 
 agent: Do you have any specification? 
 customer: I would like to depart in afternoon. 
 agent: Here, I found a flight for you with 1 stopover in economy class and it costs you 200. Can I proceed? 
 customer: Ok, please confirm my booking. 
 agent: Your booking is done with flight 1018 in Spirit airlines. 
 customer: Thank you for your help. 
 agent: Thank you for reaching us, have a safe flight.

Ex Output:
book


Ex Input:
customer: Hello. 
 agent: Hello, how can I aid you today? 
 customer: Could you please book me a plane ticket from AUS to HOU? 
 agent: Sure, your travel dates please? 
 customer: I will leave on May 17 and return on May 19. 
 agent: Is there any class preference? 
 customer: Yes, I would prefer to travel in an economy class. 
 agent: Any other requirement to be met? 
 customer: Yes, I need a lay by. 
 agent: Can you mention your name to proceed further? 
 customer: I am Jack Harris. 
 agent: American Airlines has a connecting flight with number 1022 for fare 100, shall I proceed? 
 customer: Perfect, please proceed. 
 agent: Your ticket is reserved in economy class. 
 customer: Thanks for your service. 
 agent: Thank you for opting us.

Ex Output:
book