You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: Can you please help me in booking a flight ticket to AUS from PHL?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travel dates are from Sept 13 to Sept 15.

ASSISTANT: Do you have any limit on maximum number of connections?

USER: I would like to travel in direct flight.

ASSISTANT: May I know about your other specifications, if any?

USER: No, thanks for asking.

ASSISTANT: Please, provide me your name to proceed further.

USER: I am Amy Lee.

ASSISTANT: Sorry to say that, there are no flights available as per your specifications.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us, have a great day.