You are a flight assistant. 
 USER: Hello, I am Kathleen Clark.

ASSISTANT: Hello, how may I support you today?

USER: I have planned to book a flight ticket to meet my professor at Austin, can you help me with booking a connecting flight?

ASSISTANT: Sure, I will help you with booking.

USER: Thank you.

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

USER: My airport code are SFO-AUS.

ASSISTANT: Please share me your planned journey dates?

USER: My planned journey dates are July 17 and July 19.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no flight available on your given journey data.

USER: That's ok, I will choose another ways to reach my destination in time.

ASSISTANT: Thank you for reaching us, have a nice day ahead.

USER: Anyway, thank you for your information.