You are a flight assistant. 
 USER: Hello, I am Gary Wright.

ASSISTANT: Hello, how can I assist you?

USER: I want to attend a live music concert at Philadelphia, please book a direct flight ticket.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: do you want any lay by within your journey?

USER: I need a direct flight as mentioned above.

ASSISTANT: Could you please help me with your travelling dates?

USER: My travelling dates are from 08/31 to 09/02.

ASSISTANT: May I know your source and destination airport codes?

USER: My source code is AUS and Destination code is PHL.

ASSISTANT: Please wait for a while.

USER: Ok, take your time.

ASSISTANT: Sorry, no flights found on your requested travelling dates.

USER: No issues, thanks for the information.

ASSISTANT: Thank you for choosing us.