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 Q]: customer: Hello. I am Christine Scott. 
 agent: Hello, how can I aid you today? 
 customer: I would like to book a ticket from ORD to DCA, can you please help me out? 
 agent: Sure, when are you planning to start and return on? 
 customer: I am travelling on these dates AUG 11th and 13th. 
 agent: Do you need a connecting flight or a direct flight? 
 customer: I need a connecting flight. 
 agent: There are no flights found with the given details. 
 customer: Ok no problem, thank you for your services. 
 agent: Thank you, please visit again.
[EX A]: no_flight

[EX Q]: customer: Hi. 
 agent: Hello. 
 customer: I am Mary Martin. 
 agent: How can I help you? 
 customer: Can you please reserve me a flight ticket from Washington, DC - IAD to Austin, TX - AUS? 
 agent: Sure, I am glad to help you. Could you please share your travelling dates? 
 customer: My trip dates are 04/25 - 04/27. 
 agent: Thank you for waiting, there are no flights found on your preferable dates. 
 customer: Not a problem, thank you. 
 agent: Thank you for choosing us.
[EX A]: no_flight

[EX Q]: customer: Hello. 
 agent: Hello. How may I be of your service? 
 customer: My name is Helen Allen. I want to book a fight ticket from Chicago, IL - ORD to meet my sister in Orlando, FL - MCO. 
 agent: Sure, to book a flight ticket I need to know your planned travelling dates. Can you provide it? 
 customer: My departure day is 02/25, return day is 02/27. 
 agent: Do you have any connection preference? 
 customer: Yes, I want one connection in between my journey. 
 agent: Kindly share your fare preference. 
 customer: My price limit is 5000. 
 agent: Just a moment I will check and let you know. 
 customer: Sure. 
 agent: We found an AA airline matching your request with one connection and the price 100. Shall I proceed with the flight number-1017? 
 customer: Yes, please. 
 agent: Your booking has been confirmed successfully. 
 customer: Thanks for booking a flight ticket. 
 agent: Thank you for approaching us.
[EX A]:
book