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 support you? 
 customer: Assist me in booking a flight ticket from SFO to DEN. 
 agent: I can definitely do that for you. Will you please let me know your maximum connection limit? 
 customer: Single connection flight is required. 
 agent: On what dates are you planning to make your trip? 
 customer: I preferred to travel in June 23 and June 25. 
 agent: Which airline will you prefer to travel in? 
 customer: I prefer to travel in normal cost airline. 
 agent: Do you need an economy class or business class? 
 customer: Economy class suits best to me. 
 agent: Please forward your name. 
 customer: This is Samantha Lewis. 
 agent: We found a direct flight on your way. Is that fine? 
 customer: Sure, proceed to book it. 
 agent: Your booking has been done in flight 1012 of United airlines with an estimate of 200. 
 customer: Thanks for your booking. 
 agent: Thank you for reaching us.
Example Output: book

Example Input: customer: Hi. 
 agent: Hello. 
 customer: Laura Turner here. 
 agent: How may I aid you? 
 customer: Can you book a flight ticket for my airport codes that is from IAH to IAD? 
 agent: Ok, please mention your dates of travel. 
 customer: The travel dates are from Jan 03 to Jan 05. 
 agent: Do you have any other requirements? 
 customer: I would like to prefer a flight with a stopover option. 
 agent: There is a connecting flight-1009 in economy class, is it fine for you? 
 customer: You can book the flight ticket. 
 agent: Ok, booking is done on Delta airlines. 
 customer: Thank you. 
 agent: Welcome.
Example Output: book

Example Input: customer: Hello, I am Samuel Hall from Las Vegas. 
 agent: Hello, how may I help you at this moment? 
 customer: I need to attend an conference meeting at Philadelphia, PA-PHL. So can you please help me in booking a ticket within fare of 200? 
 agent: Sure, I will aid you. Please send your travelling dates. 
 customer: My travelling dates are from 06/24 to 06/26. 
 agent: Noted. Can I have your source airport code? 
 customer: My boarding airport code is NV-LAS. 
 agent: There is a connecting flight available with Spirit airline, shall I book it? 
 customer: I don't want Spirit airline, can you please check for any another airline for me? 
 agent: Yes, Hawaiian airline is also providing service on your route. Shall I proceed? 
 customer: That's perfect airline for me, please proceed for booking. 
 agent: Your booking is done with flight number 1007. Happy journey. 
 customer: Thanks for your extendable customer support in booking. 
 agent: You are welcome. Thank you for reaching us, have a nice day.
Example Output:
book

