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

Ex Input:
customer: Hello. 
 agent: Hello. 
 customer: I am Elizabeth Wilson. 
 agent: How may I assist you today? 
 customer: Can you please help me in booking my flight ticket from IAD to PHL? 
 agent: Sure, please provide me your travel dates. 
 customer: Ok, my travelling dates are 09/12 and 09/14. 
 agent: Frontier airline is providing flight for you with price 100. Shall I proceed? 
 customer: Ok, please proceed. 
 agent: Your ticket has been booked with flight-1019. 
 customer: Thank you. 
 agent: My pleasure.

Ex Output:
book


Ex Input:
customer: Hello. 
 agent: Hello. 
 customer: I am David Parker. 
 agent: How can I assist you for the day? 
 customer: I am planning to visit New York, can you please book me the ticket from OAK to JFK? 
 agent:  Sure, I am here to help you with that flight ticket booking. May I know your  preferable travel dates, please? 
 customer: My preferable journey dates are from 11/10 to 11/12. 
 agent: Sorry to tell you that, there are no flights available as per your given travel dates. 
 customer: Ok, not an issue. I will find any alternate for this trip. Thank you for providing information. 
 agent: You are welcome, thank you for approaching us.

Ex Output:
no_flight


Ex Input:
customer: Hi. 
 agent: Hello, how may I assist you today? 
 customer: I want to visit DTW, can you help me to book flight ticket from LGA? 
 agent: Sure, can you please share your journey dates? 
 customer: My journey dates to travel are Oct 8 and Oct 10. 
 agent: Do you have any connection limit? 
 customer: I want maximum connection of one flight. 
 agent: Let me know your airline preference? 
 customer: I do not have any airline preference. 
 agent: Any other requirements to be met? 
 customer: No, thank you for asking. 
 agent: May I know your name? 
 customer: Myself Angela White. 
 agent: Sorry, there are no flights found with your given details. 
 customer: Ok, not a problem. Thank you. 
 agent: Thank you for reaching us.

Ex Output:
no_flight