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

customer: Hello. 
 agent: Hello, how may I serve you today? 
 customer: I would like to travel from BOS to JFK as a business trip, can you do the reservation? 
 agent: Sure, may I know your good name please? 
 customer: Daniel Hall here. 
 agent: When you are willing to travel? 
 customer: My trip dates are Jan 16th and Jan 18th. 
 agent: Is there any connection limit for you? 
 customer: I need break in my journey. 
 agent: Please share your other specifications if you have. 
 customer: No. 
 agent: Thank you for waiting and we have found a flight in an economy class with 1 connection in Hawaiian airlines and the fare of your flight will be 100. Do you like me to proceed your booking with this flight? 
 customer: Please carry on. 
 agent: Your ticket has been reserved with flight number 1004. 
 customer: Thank you so much. 
 agent: Thank you for approaching us.
book

customer: Hi. 
 agent: Hello, how may I guide you? 
 customer: I am Patricia Brown here, I want to reserve my ticket from LAS to ATL, can you please help me? 
 agent: Sure, can I know your preferable dates? 
 customer: Sure, my planned dates of journey are from 11/26 to 11/28. 
 agent: I found a direct flight 1002 of Frontier airlines matches with your preferences, can I proceed? 
 customer: Ok, you can book it. 
 agent: Your ticket is booked. 
 customer: Thank you for your help in booking my ticket. 
 agent: Thank you, have a good day.
book

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.
book