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 guide you today? 
 customer: Can you please help me with booking a flight ticket from HOU to ATL? 
 agent: Sure, can you please share your travelling dates? 
 customer: My travelling dates are from Nov 05-07. 
 agent: Do you have class preference? 
 customer: I am comfortable with any class. 
 agent: Do you need connection limit? 
 customer: I would be comfortable with single stop over. 
 agent: May I know your name? 
 customer: David Thomas here. 
 agent: We found Hawaiian Airline with fare 100 and flight number is 1013 with connecting flight. Shall I proceed with the booking? 
 customer: You can proceed with booking. 
 agent: Your booking is done. 
 customer: Thank you for the help. 
 agent: Thank you for choosing us.
Example Output: book

Example Input: customer: Hello. 
 agent: Hello. How may I assist you? 
 customer: Please reserve me a flight ticket from LGA to DEN. 
 agent: Sure, may I know your connection limit? 
 customer: My connection limit is 1. 
 agent: May I know your trip dates? 
 customer: My travel dates are May 21 and May 23. 
 agent: Do you prefer any specifications? 
 customer: No. 
 agent: Please share your name? 
 customer: My name is Brandon Parker. 
 agent: Sorry, no flights found on your route. 
 customer: No problem, thank you for the information. 
 agent: Thank you.
Example Output: no_flight

Example Input: customer: Hi. Dennis Hall here. 
 agent: Hello. How can I help you? 
 customer: Reserve a flight ticket that is from SEA to CLT. 
 agent: Can you please tell your travelling dates? 
 customer: My travel dates are from 03/18 to 03/20. 
 agent: Sorry, there are no flights available with your requested details. 
 customer: Ok, not a problem. Thank you. 
 agent: Thank you and have a nice day.
Example Output:
no_flight