You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Paul Garcia. Can you help me with booking ticket from AUS to ATL, to meet my parents.

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: Ok, my planned dates are from Aug 19 to 21.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I would like to departure in the morning time and return in the evening time.

ASSISTANT: Do you have any requirements?

USER: Yes, I need a flight in economy class with single connection.

ASSISTANT: Sorry, no flight is available for you.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for reaching us.