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 assist you today? 
 customer: Can you help me to book a flight ticket from MCO to LGA? 
 agent: Sure, may I know your planned travel dates? 
 customer: My travel dates are Feb 22 and Feb 24. 
 agent: Do you want connecting flight? 
 customer: I prefer direct flight for this trip. 
 agent: Do you have any other requirements? 
 customer: No, thanks for asking. 
 agent: May I know your name please? 
 customer: I am Christopher Martinez. 
 agent: Sorry, there are no flights found with your given details. 
 customer: No problem, thank you for the information. 
 agent: Thank you for opting us.

Output: no_flight


Input: Consider Input: customer: Hi. 
 agent: Hello, how may I aid you? 
 customer: Can you book a connecting flight to Oakland? 
 agent: Sure, could you please provide your willing dates to travel? 
 customer: My travel dates would be from 10/01 to 10/03. 
 agent: Ok, may I know the code of airport to search for the flight? 
 customer: I am planning a business trip and my airport codes are MCO to OAK. 
 agent: Ok, please wait a moment. 
 customer: Sure. 
 agent: Ok, there is a flight 1019 in AA airline matching your details with price 100. Shall I proceed? 
 customer: I am fine with this flight and you can book it. 
 agent: May I know your name to book the ticket? 
 customer: Nicholas Lee here. 
 agent: Ok, your booking is done. 
 customer: Thanks for your help. 
 agent: You are welcome.

Output: book


Input: Consider Input: customer: Hello,. 
 agent: Hello, how may I assist you? 
 customer: I need to book a flight ticket to TX-DFW with a direct flight, so can you please help me out with this? 
 agent: Sure, may I know your journey dates? 
 customer: I want to start on 02/06 and return on 02/08. 
 agent: Can you share your origin airport code? 
 customer: My origin is Las Vegas, LAS. 
 agent: May I know your good name for further process? 
 customer: My name is John Baker. 
 agent: No flights found on your journey dates. 
 customer: Not a problem, thank you. 
 agent: Thank you for choosing us, have a nice day.
Output: no_flight