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

Input: Consider Input: customer: Hello.
agent: Hello, how may I serve you today?
customer: I planned to meet my friend in DFW, can you please help me to book a flight ticket from OAK?
agent: Sure, can I know your good name please?
customer: I am Eric Williams.
agent: When you are willing to travel?
customer: I prefer to travel on Apr 27 and Apr 29.
agent: Would you let us know if you have any other preferences?
customer: I prefer to travel in a connecting flight.
agent: We found a connecting flight 1005 in JetBlue airlines at the cost of 200 with economy class. Can I proceed for booking?
customer: Ok, please confirm my booking.
agent: Your booking is done.
customer: Thank you for your help.
agent: Thank you for choosing us.

Output: book

Input: Consider Input: customer: Hello,. I am Cynthia Roberts.
agent: Hello, how can I help you now?
customer: I made a earlier reservation to go for a trip with my friends, due to some financial problems, it got postponed. Can you please change my existing reservation?
agent: Sure, I will help you with that.
customer: Thank you.
agent: Please wait for a moment, while I check for the reservation.
customer: Sure.
agent: Thank you for waiting, sorry there is no reservation found on your name in our system data.
customer: Ok, no issue. Thank you for your information.
agent: Thank you for reaching us, we hope see you again.

Output: no_reservation

Input: Consider Input: customer: Hello, I am Charles Rodriguez.
agent: Hello, how can I aid you?
customer: I am planning attend my friend birthday party in Washington, can you please help me to book a flight ticket?
agent: Sure, could you please provide your journey details?
customer: My journey dates are 12/15 to 12/17. I am travelling from CO - OAK to DC - DCA. Make sure that my price limit is 5000. And I need flight with single connection.
agent: Please wait a moment, I will check the availability and get back to you.
customer: Ok.
agent: We are sorry to notify you that there is no flights available based in your given details.
customer: Ok, no issues.
agent: Thanks for choosing us.
customer: Thanks for your service.
agent: Have a nice day.
customer: Thank you.
Output: no_flight