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. How may I aid you? 
 customer: Can you please help me in booking a flight ticket from Orlando, MCO to Houston, HOU? 
 agent: May I know on which dates you are willing to travel? 
 customer: My journey dates are from Oct 31 to Nov 02. 
 agent: Do you have any other requirements? 
 customer: I prefer only economy class flight. 
 agent: May I know your name? 
 customer: My name is Nancy Davis. 
 agent: Sorry to inform you that unfortunately there is no flights available by the given details. 
 customer: Ok, that's not a problem. Thanks for your information. 
 agent: Thank you.

Ex Output:
no_flight


Ex Input:
customer: Hello. 
 agent: Hello. 
 customer: I am Karen Walker. 
 agent: How can I assist you? 
 customer: I want to book a ticket from PHL to JFK to attend seminar, can you help me in booking? 
 agent: Sure, please provide me your journey dates. 
 customer: I am departing on 03/17 and return on 03/19. 
 agent: Please wait for a minute. 
 customer: Sure. 
 agent: I found a flight in Southwest airlines with price 200. Shall I book the ticket for you? 
 customer: Please proceed for booking. 
 agent: Your ticket is confirmed and the flight number is 1018. 
 customer: Thank you. 
 agent: Thank you for contacting us.

Ex Output:
book


Ex Input:
customer: Hi. 
 agent: Hello. What kind of help are you expecting from my side? 
 customer: I would like to cancel my recently done reservation, due to some health issues. Can you please help me in this? 
 agent: Sure, let me check. I am sorry to inform you that there are no reservations with your name. Can I know your name? 
 customer: My name is Janet Scott here. Thank you for your information. 
 agent: Thank you Janet, have a good day. 
 customer: Welcome.

Ex Output:
no_reservation