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: Hi. I am Jonathan Davis. 
 agent: Hello, how can I amend you? 
 customer: Can you reserve me a flight ticket to Charlotte, CLT as I would like to visit The Billy Graham library? 
 agent: Sure. 
 customer: Thank you. 
 agent: Let me know your origin code. 
 customer: Origin code is Boston, BOS. 
 agent: How much you can afford for this journey? 
 customer: I can afford up to 500. 
 agent: Let me know your trip dates to check the flights. 
 customer: 02/12 and 02/14 are my depart and arrival dates. 
 agent: Please, wait. 
 customer: Ok. 
 agent: Thanks for waiting, there is flight with price 800. Shall I Proceed? 
 customer: No, do not proceed. 
 agent: Ok. 
 customer: Thank you for your response. 
 agent: Thank you for choosing us.
[EX A]: no_reservation

[EX Q]: customer: Hi. 
 agent: Hello. How may I assist you? 
 customer: Owing to an emergency I had to request for this change reservation. 
 agent: Ok, I will help you with that. Can I have your name , please? 
 customer: My name is Anna Young. 
 agent: Hold on a moment. 
 customer: Sure. 
 agent: I am sorry, there is no reservation found on your name to change. 
 customer: Thank you. 
 agent: Thank you for availing us.
[EX A]: no_reservation

[EX Q]: customer: Hi. 
 agent: Hello. How can I help you today? 
 customer: I am planning to travel from IAD to MSP, help me in booking a flight? 
 agent: Sure, I am here to help you with that. Can you please share your preferable travel dates? 
 customer: I like to travelling dates are DEC to 26 to 28. 
 agent: May I know your name please? 
 customer: I am Sharon Jones. 
 agent: Would you like to board a direct flight or connecting flight? 
 customer: I prefer single connection flight. 
 agent: Do you have any other specifications? 
 customer: No. 
 agent: Hawaiian Airlines are having a flight-1007 with single connection limit and the ticket fare is 100. Shall I proceed with booking? 
 customer: Proceed for booking. 
 agent: Sharon Jones, your reservation is done in economy class. 
 customer: Thank you. 
 agent: Most welcome, thank you for reaching us. Have a safe journey.
[EX A]:
book