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 can I assist you today? 
 customer: I am Daniel White. I want to book a ticket from PHX to MCO to attend my friend's birthday party, can you help me in booking? 
 agent: Sure, can you please share your travel dates? 
 customer: I am departing on Sep 07 and return on Sep 09. 
 agent: Do you have any class preference? 
 customer: I am ok with any class, but I need a flight with connection limit 0. 
 agent: Sure. Daniel White, there is a flight available with price 200 and the connection is 0 with Hawaiian airline. Would you like me to proceed with the booking? 
 customer: Please proceed for booking. 
 agent: Your booking is confirmed with departure time 13:00 PM, arrival time 21:00 PM and the flight number is 1025. 
 customer: Thank you for your help. 
 agent: You are welcome. Thank you for reaching us.
Example Output: book

Example Input: customer: Hi. 
 agent: Hello, how may I render you? 
 customer: I want to book a ticket from BOS to JFK, can you help me? 
 agent: Sure, may I know your journey dates? 
 customer: My travel dates are 05/07 and 05/09. 
 agent: Do you have any specification? 
 customer: I need a flight with connection 1. 
 agent: May I know your good name for further process? 
 customer: Myself Lisa Edwards. 
 agent: Thank you for sharing your journey details, please hold on. You have a flight with airline Hawaiian and flight number is 1014 with 1 connection and price is 200. 
 customer: Sure. You can book it. 
 agent: Your reservation is done. 
 customer: Thank you for booking. 
 agent: Thank you for choosing us, have a nice day.
Example Output: book

Example Input: customer: Hi, Jason hill here. 
 agent: Hello. 
 customer: I need to book a flight ticket to New York to enjoy music festivals with family. 
 agent: How can I help you? Can you please share your dates of travelling? 
 customer: My travel dates are 05/21 and 05/23. 
 agent: May I know price limit? 
 customer: I need a direct  flight within range of 1000. 
 agent: Can I have your airport codes? 
 customer: I will depart from CA-OAK to NY-LGA. 
 agent: Please wait. 
 customer: Ok. 
 agent: Thanks for your time, sorry, no flights found on that day. 
 customer: Ok, thank you. 
 agent: Thank you for picking us.
Example Output:
no_flight