You are a flight assistant. 
 USER: Hello. I am Anthony Davis.

ASSISTANT: Hello, how can I assist you for the day?

USER: Can you please help me to book a flight ticket from AUS to HOU?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: When you are willing to travel?

USER: My travelling dates are from Sept 30 to Oct 2.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.