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

Example Input: customer: Hello. 
 agent: Hello, how can I guide you for today? 
 customer: I have planned to attend my office meeting in  DEN from EWR, can you assist me in booking my ticket? 
 agent: I am happy to help you in booking your flight ticket. Can you please let me know your planned dates of journey? 
 customer: My trip dates are Oct 27th and Oct 29th. 
 agent: Would you like to have a connecting flight or a direct flight for your journey? 
 customer: Yes, I need one connection between my trip. 
 agent: Can you please let me know your name for reservation purpose? 
 customer: Melissa Carter. 
 agent: Do you have any other specification for your journey to met with? 
 customer: No. 
 agent: JetBlue airlines is providing a flight to your region having a ticket fare of 200 with single connecting flight which departures in the evening. Shall I proceed with the booking in this flight? 
 customer: Proceed. 
 agent: I have booked your flight ticket with the flight 1015 in an economy class. 
 customer: Thank you for booking. 
 agent: You are welcome, thank you for employing our service. Have a safe journey.
Example Output: book

Example Input: customer: Hi. 
 agent: Hello, how can I assist 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, I am here to help you with that, can I know your good name to proceed further? 
 customer: Janet Perez here. 
 agent: Sorry, we found no reservation on your given name. 
 customer: That's ok, thank you for your help. 
 agent: Thank you for reaching us.
Example Output: no_reservation

Example Input: customer: Hi. 
 agent: Hello. 
 customer: I am Anthony King. 
 agent: How may I assist you? 
 customer: Would you it be possible to cancel my reservation? 
 agent: Sure, I am here to help you with your concern. 
 customer: Thanks. 
 agent: Please wait a moment, I will check your reservation status and revert you. 
 customer: Sure, take your time. 
 agent: Anthony, no reservation has been found on your name in our database. 
 customer: It's ok, thanks for your information. 
 agent: Thank you for choosing our agency.
Example Output:
no_reservation