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 may I help you?
customer: Can you help me to book a flight ticket from DFW to JFK?
agent: Sure, could you please provide your travelling dates to search for the flight?
customer: Ok, my dates are Oct 4th and 6th respectively.
agent: May I know your preferable depart and return journey timings?
customer: No specifications regarding the flight timings.
agent: Do you have any class preferences?
customer: Ok, please book a economy class flight.
agent: There is a connecting flight 1017 of Southwest airlines, can I proceed?
customer: Ok, please book a ticket on the name Angela Johnson.
agent: Ok, your booking is done. Thank you for choosing us, have a happy journey.
customer: That is good, thank you for assisting me.
Example Output: book

Example Input: customer: Hello.
agent: Hello.
customer: Jeffrey Campbell here.
agent: Campbell, how can I assist you?
customer: My interview got postponed, so I want to reschedule my itinerary dates.
agent: Sure, I will help you with that. Let me check your reservation status.
customer: Sure.
agent: Campbell, I did not find any reservation by your name in our database.
customer: It's ok, thank you.
agent: You are welcome and thank you for choosing us.
Example Output: no_reservation

Example Input: customer: Hello.
agent: Hello. How can I assist you today?
customer: Can you aid me in booking a flight ticket from JFK to MSP?
agent: Sure, can you please share your travel dates?
customer: I am planning to start on June 27th and return back on June 29th.
agent: May I know your connection limit?
customer: Make sure that connection limit is 1.
agent: Do you have any other specification that you are looking for?
customer: No, all preferences have been mentioned.
agent: May I know your name to proceed further?
customer: I am Matthew Campbell.
agent: There is a flight available with price 100 and the connection is 0 with Southwest airline. Would you like me to proceed with the booking?
customer: Yes, you can g ahead.
agent: Your booking is confirmed with 1005 flight number and the departure time is 21:00 hours, return time is 8:00 hours.
customer: Thank you for the support.
agent: Thank you for contacting us.
Example Output:
book