You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am David Carter.

ASSISTANT: How may I guide you?

USER: I need to schedule my trip to Chicago for attending a business meeting. Can you please help me for booking the ticket from AUS to ORD?

ASSISTANT: Sure, can I know your preferable dates?

USER: I will drop-off 11/21 and again I will be return back on 11/23.

ASSISTANT:  I found a flight 1008 of UA airlines matches with your preferences, can I proceed?

USER: Sure, you can proceed for booking.

ASSISTANT: Your ticket is booked.

USER: Thank you very much for booking the ticket.

ASSISTANT: Thank you, have a good day.