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, I am Betty Campbell. 
 agent:  Hello, How exactly I can serve you the best today? 
 customer: Can you help me to book a direct flight from LGA - OAK? 
 agent: Sure, I will help you with that. 
 customer: Thanks. 
 agent: Kindly, mention your travelling dates? 
 customer: My travelling dates are 07/26 and 07/28. 
 agent:  Ok, please wait a moment, let me search a flight for you. 
 customer: Sure. 
 agent: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions. 
 customer: Ok, no issues. Thank you. 
 agent: Thank you for choosing us.
Example Output: no_flight

Example 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.
Example Output: book

Example Input: customer: Hello. I am Gary Thomas. 
 agent: Hello. How may I assist you? 
 customer: I am looking for a flight from LAS to PHL, can you please help m in booking? 
 agent: Sure, could you please share your planned journey dates please? 
 customer: I am planning to start my journey on Mar 25 and return back on Mar 27. 
 agent: Do you need a connecting flight? 
 customer: Yes, I need a connecting flight. 
 agent: May I know your specific timings of your journey? 
 customer: My arrival time is evening. 
 agent: Do you have any other preferences? 
 customer: No. 
 agent: Gary Thomas, no flights has been found on your planned travel dates. 
 customer: That's ok, thank you for checking. 
 agent: Thank you for reaching us.
Example Output:
no_flight