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. 
 agent: Hello, how may I assist you today? 
 customer: I would like to cancel my reservation which is under my name. Can you please help me with that? 
 agent: Sure, may I know your name please? 
 customer: My name is William Mitchell. 
 agent: Please wait for a moment. 
 customer: Sure, take your time. 
 agent: Sorry to inform you that, there is no reservation found as per your name in our database. 
 customer: Ok, no issues. Thank you for checking. 
 agent: Thank you for reaching us with a query. 
 customer: You are welcome.
[EX A]: no_reservation

[EX Q]: customer: Hello. 
 agent: Hello. How can I help you today? 
 customer: I am Dorothy Turner, I am going to Washington DC to take tour of White house with my family. Help me to find a flight of price 1000. 
 agent: Could you please provide me airport codes? 
 customer: I will fly from NC-CLT to DC-IAD. Please find a flight with single connection. 
 agent: Sure. To check with availability of flights, I need your travel dates. 
 customer: My travel dates are for depart is 06/29 and returning on 07/01. 
 agent: Please be online, I will revert you with flight details. 
 customer: Ok. 
 agent: Thanks for your time, Delta airline is available with flight number 1015. Can I process the booking? 
 customer: Yes. 
 agent: Ok, Your ticked is confirmed.Thanks for reaching us. 
 customer: Thanks for your service.
[EX A]: book

[EX Q]: customer: Hi. 
 agent: Hello. 
 customer: I am Larry Williams. 
 agent: How can I assist you? 
 customer: Please search flights on these routes MCO to PHX to attend my business meeting? 
 agent: Can I know your travel dates? 
 customer: My travelling dates are 06/04 and 06/06. 
 agent: Please give me a minute. 
 customer: Ok, I will wait for your reply. 
 agent: The flight 1004 of Spirit airlines is available on your requested dates with a price of 100. Shall I proceed? 
 customer: Proceed to booking that flight. 
 agent: Larry, your reservation has done successfully. 
 customer: Thank you for booking. 
 agent: You are welcome.
[EX A]:
book