You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Katherine Clark here.

ASSISTANT: How may I assist you?

USER: Can you book a flight ticket for my airport codes that is from PHL to AUS?

ASSISTANT: Sure, I am glad to help you out. Can you please share your travel dates?

USER: The travel dates are from May 06 to May 08.

ASSISTANT: Do you have any connection limit?

USER: I need a single connecting flight.

ASSISTANT: May I know your airline preference?

USER: That does not matter. The return time would be morning. And I need a economy class.

ASSISTANT: Ok, do you have any other requirements?

USER: That is it.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for choosing us.