You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you now?

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

ASSISTANT: Sure, I am here to help you. May I know your travel dates?

USER: My preferable journey dates are Sept 10 and Sept 12.

ASSISTANT: Do you have any connection limit?

USER: I need a flight with single connection.

ASSISTANT: Let me know your airline preference.

USER: I always prefer normal-cost airlines.

ASSISTANT: Do you have any other requirements?

USER: No, thank you for asking.

ASSISTANT: Ok, please wait for a while.

USER: Ok, I will wait for your response.

ASSISTANT: United Airlines is providing you the connecting flight in economy class, Shall I proceed?

USER: Sure, you can proceed with the booking.

ASSISTANT: Please, let me know your name to book the ticket.

USER: Myself William Perez.

ASSISTANT: Your ticket has been reserved with flight-1022.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us, have a safe journey.