You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I need to travel from AUS to PHL, can you help me in doing that?

ASSISTANT: Sure, may I know the journey dates?

USER: My journey dates are Dec 20 to 22.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: I am Susan Gonzalez.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no flights found with your chosen dates.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for opting us.