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: Consider 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.

Output: book

Input: Consider Input: customer: Hello.
agent: Hello, how may I be at your service today?
customer: Can you please help me to book a flight from AUS to CLT?
agent: Sure, I will help you in booking the ticket. May I know your travelling dates please?
customer: Sure, I want to travel on Feb 15 and need to return on Feb 17.
agent: Do you have any other specifications?
customer: I need a connecting flight.
agent: Please help me with your name for booking.
customer: Myself Donald Rodriguez.
agent: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 with flight number 1019. Shall I proceed with this flight?
customer: Ok, please proceed.
agent: Your booking is done.
customer: Thank you.
agent: Most welcome.

Output: book

Input: Consider Input: customer: Hello.
agent: Hello, how may I help you?
customer: My name is Stephanie Carter.
agent: Nice to meet you Stephanie Carter.
customer: I want to book a ticket from IAH to SEA, could you please help me?
agent: Sure, may I know your travelling dates?
customer: My required dates are 05/19 and 05/21.
agent: I am sorry there is no flight available with us.
customer: It's ok. Thank you for the help.
agent: Thank you for approaching us.
Output: no_flight