You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I address you today?

USER: I would like to head from Philadelphia to attend a movie festival at Austin, TX - AUS. Can you help me book a flight ticket?

ASSISTANT: Sure, I'll help you. Please mention your source airport code.

USER: I intend to leave from PHL.

ASSISTANT: Kindly share your travelling dates.

USER: I am planning to start on 09/03 and return on 09/05.

ASSISTANT: Do you need a stopover in between your journey?

USER: Yes, I do need a lay by.

ASSISTANT: May I know your fare preference?

USER: It should not exceed 500.

ASSISTANT: Thanks for providing information, we found a Spirit airline matching your request.

USER: Let me know the flight details please.

ASSISTANT: We found a direct flight with your details, shall I proceed further?

USER: No, I need a connecting flight. Please recheck.

ASSISTANT: May I know your name please? Sorry to inform you there are no connecting flights.

USER: My name is Angela Taylor. Ok, thank you for your response.

ASSISTANT: Thanks for contacting us, have a nice day.