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 am Eric Baker want to present my documentation in National Conference at NY-EWR. Can you book a ticket from TX-HOU? 
 agent: Sure, we are perky to serve you. May I know your trip dates? 
 customer: My trip dates are 02/10 and 02/12. 
 agent: Sorry to inform you that, no flights are available based on your requirements. 
 customer: Ok, no issues. Thank you for your help. 
 agent: Thank you for choosing us.

Ex Output:
no_flight


Ex Input:
customer: Hello. 
 agent: Hello, how may I assist you today? 
 customer: Can you please help me in booking a flight ticket from LAS to EWR? 
 agent: Sure, can you please let me know your travel dates? 
 customer: I want to fly on July 06 and return on July 08. 
 agent: Do you prefer a connection in between the journey? 
 customer: I need a single connection. 
 agent: Do you have any other requirements? 
 customer: I don't have any other requirements. 
 agent: Ok, please wait for a minute. 
 customer: Ok. 
 agent: We found a connecting flight in Hawaiian Airlines with flight number 1022 having an economy class. Shall I proceed for booking? 
 customer: You can proceed to booking. 
 agent: May I know your name to book a ticket? 
 customer: Myself Nicole Phillips. 
 agent: Your booking has been processed. 
 customer: Thank you. 
 agent: Thank you for approaching us.

Ex Output:
book


Ex Input:
customer: Hello, Donna Rodriguez here. 
 agent: Hello. How can I assist you today? 
 customer: I planned to meet my friend in MSP, can you please help me to book the flight ticket from DTW? 
 agent: Sure, will you provide your travelling dates that you want to travel? 
 customer: I would like to travel on 01/11 and 01/13. Please search for a 1 connecting flight. 
 agent: Please give me a moment. 
 customer: Sure. 
 agent: Thank you for waiting. Based on your details, there is a flight with price 100 and the connections 1 is available. 
 customer: Ok, please proceed to book the ticket. 
 agent: Your ticket is booked. The flight number is 1009 and the airline is UA. 
 customer: Thank you for the help. 
 agent: Welcome, have a great day.

Ex Output:
book