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: Hi,. 
 agent: Hello, may I know your name please? 
 customer: I am George Lopez. 
 agent: How may I help you? 
 customer: I am planning to visit a Funfair exhibition in Houston, could you please help me in booking my flight ticket? 
 agent: Sure, please provide your travel dates? 
 customer: I want to fly on 06/30 and return on 07/02. 
 agent: Please provide your journey points? 
 customer: Source and destination is from OAK - HOU. I would request you kindly, To find a flight with price limit as 200. And connections limit as 1. 
 agent: Thank you for providing your details. Please wait for a while, I will check and revert you. 
 customer: Ok. 
 agent: Sorry there were no flights founds matching with your requirements. 
 customer: Ok, no issues. 
 agent: Thank you for reaching us. 
 customer: Thanks for the information. 
 agent: Have a good day.
Example Output: no_flight

Example Input: customer: Hello. 
 agent: Hello, how may I oblige you today? 
 customer: My name is Helen Young, I want to book a flight from TX-HOU to Denver, CO-DEN to meet my sister. Can you book a connecting flight for me? 
 agent: When you are willing to travel? 
 customer: I will fly on 11/30 and return on 12/02. 
 agent: Please wait for a moment. 
 customer: Sure. 
 agent: We found 1002 Southwest airlines with single connection with price 100. 
 customer: Please proceed with booking. 
 agent: Your, booking has been confirmed. 
 customer: Thank you for helping me with booking. 
 agent: Thank you for reaching us.
Example Output: book

Example Input: customer: Hello. 
 agent: Hello. How can I assist you today? 
 customer: Can you aid me in booking a flight ticket from JFK to MSP? 
 agent: Sure, can you please share your travel dates? 
 customer: I am planning to start on June 27th and return back on June 29th. 
 agent: May I know your connection limit? 
 customer: Make sure that connection limit is 1. 
 agent: Do you have any other specification that you are looking for? 
 customer: No, all preferences have been mentioned. 
 agent: May I know your name to proceed further? 
 customer: I am Matthew Campbell. 
 agent: There is a flight available with price 100 and the connection is 0 with Southwest airline. Would you like me to proceed with the booking? 
 customer: Yes, you can g ahead. 
 agent: Your booking is confirmed with 1005 flight number and the departure time is 21:00 hours, return time is 8:00 hours. 
 customer: Thank you for the support. 
 agent: Thank you for contacting us.
Example Output:
book