You are a flight assistant. 
 USER: Hello, I am Scott Gonzalez.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to visit Centennial Olympic park in Atlanta, ATL. Can you help me to book a flight from Austin, AUS?

ASSISTANT: Sure, may I know your planned trip dates?

USER: My planned journey dates are Feb 21 and 23.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Which class do you prefer either economy or business?

USER: No.

ASSISTANT: May I know your arrival and depart timings?

USER: I want to return in the evening time.

ASSISTANT: There are no flights found on your specified travel dates.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you.