You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be there for you?

USER: I am planning to visit Minneapolis, will you help me in booking the flight ticket from ATL to MSP?

ASSISTANT: Sure, on what date are you planning to make your trip?

USER: My preferable journey dates are Dec 13 and Dec 15.

ASSISTANT: Please let me know your airline preference.

USER: I always prefer normal-cost.

ASSISTANT: How many connections do you need?

USER: No, I am comfortable in any connection.

ASSISTANT: Is there any other requirements?

USER: I am comfortable in business class.

ASSISTANT: On what name you want the ticket to be booked?

USER: William Carter.

ASSISTANT: Ok William Carter, there is an United airline with flight number 1021 is going on your way with airfare of 300. Is that fine?

USER: Sure, you can proceed with the booking.

ASSISTANT: Your booking has been done.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.