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

Example Input: customer: Hello. 
 agent: Hello. 
 customer: I am Gregory Carter. 
 agent: How may I help you today? 
 customer: Can you please reserve me a flight ticket which is having it's depart time in the afternoon and return in the afternoon? 
 agent: Sure, let me know your travel dates please? 
 customer: I have planned to travel on Jan 11th and return on Jan 13th. 
 agent: Could you please share me your airport codes? 
 customer: I would like to fly from EWR to MCO. 
 agent: Ok, is there any class preference? 
 customer: I prefer connecting flight. 
 agent: Do you need any airline preference? 
 customer: No. 
 agent: Please wait for a while. 
 customer: Ok. 
 agent: Jet Blue airlines is providing a connecting flight with the ticket fare of 100 and depart time is 14:00 PM, arrival time is 16:00 PM. Shall I proceed? 
 customer: Ok, please book this ticket. 
 agent: Your ticket has been confirmed by flight number 1025 and an economy class. 
 customer: Thank you. 
 agent: Thanks for choosing us.
Example Output: book

Example Input: customer: Hi. 
 agent: Hello. How may I help you? 
 customer: Can you pleas check for the flights from Dec 21 to Dec 23. 
 agent: Sure, what are your trip source and destination? 
 customer: My airport codes are from ORD to DFW. 
 agent: Do you need any connections? 
 customer: Please check for 1 connecting flight. 
 agent: Are there any other preferences? 
 customer: I will be returning in afternoon with economy class. 
 agent: May I know your name? 
 customer: My name is Sandra King. 
 agent: Sorry, there is no flight found with your details. 
 customer: Oh! That's fine. Thank you for checking. 
 agent: Thank you for reaching us. 
 customer: Most welcome.
Example Output: no_flight

Example Input: customer: Hi. 
 agent: Hello, how may I assist you today? 
 customer: I am planning to visit the Daniel Stowe Botanical Garden at Charlotte. Can you please help me in booking a ticket? 
 agent: Sure, can you share your travel dates please? 
 customer: My travel dates are June 23 and June 25. 
 agent: May I know your specific airport codes? 
 customer: My journey airport codes are LAX and CLT. 
 agent: Do you have any connection limit? 
 customer: Yes, I am looking for a flight with one connection. 
 agent: Please share me your good name to proceed for further. 
 customer: My name is Timothy Rodriguez. 
 agent: Do you have any other specifications? 
 customer: No. 
 agent: We found a connecting flight 1020 in United Airlines with cost 300. Shall I proceed for booking with economy class? 
 customer: Yes, proceed. 
 agent: Your ticket has been reserved. 
 customer: Thank you for your help. 
 agent: Thank you for supporting us.
Example Output:
book