You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: Ronald Perez here. I would like to attend a business meeting at ATL, can you aid me to book a flight ticket from AUS?

ASSISTANT: Sure. Can I know your travelling dates?

USER: My travelling dates are 21 and 23 of Dec.

ASSISTANT: Do you need any break?

USER: I need a direct flight.

ASSISTANT: Do you have any other specifications?

USER: No, I don't have any other specifications.

ASSISTANT: Ok. Please wait a while.

USER: Ok, take your own time.

ASSISTANT: Thanks for your time. unfortunately there are no flights found with your essential details.

USER: It's ok, thank you for giving information.

ASSISTANT: Thank you for approaching us.