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 assist you at this moment?
customer: I need to cancel my reservation as I need to stay back in own city, due to my house has collapsed by Floods.
agent: May I know your name to track your details?
customer: Sure, I am Patricia Roberts.
agent: Ok, please give me a minute.
customer: Sure.
agent: Thanks for your time, no reservation was found based on your name.
customer: Ok, Thank you for your service.
agent: Thank you for consulting us.
Example Output: no_reservation

Example Input: customer: Hello.
agent: Hello. How can I help you today?
customer: I am Dorothy Turner, I am going to Washington DC to take tour of White house with my family. Help me to find a flight of price 1000.
agent: Could you please provide me airport codes?
customer: I will fly from NC-CLT to DC-IAD. Please find a flight with single connection.
agent: Sure. To check with availability of flights, I need your travel dates.
customer: My travel dates are for depart is 06/29 and returning on 07/01.
agent: Please be online, I will revert you with flight details.
customer: Ok.
agent: Thanks for your time, Delta airline is available with flight number 1015. Can I process the booking?
customer: Yes.
agent: Ok, Your ticked is confirmed.Thanks for reaching us.
customer: Thanks for your service.
Example Output: book

Example Input: customer: Hello, I am Deborah Adams.
agent: Hello, how may I assist you?
customer: Can you make a reservation from ORD to DCA for me?
agent: Sure, may I know your planned travel dates please?
customer: I am planning to start on 10/22 and return back on 10/24.
agent: There is a flight available on your requested dates from Hawaiian airlines with 1 connecting flight.Shall I confirm your booking?
customer: Yes, you can go ahead.
agent: Your ticket is booked with flight 1000.
customer: Thank you for the support.
agent: You are welcome.
Example Output:
book