You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sandra Hall. I need a direct flight in my journey, can you help me in booking?

ASSISTANT: How can I help you? Sure, can you please tell your travelling dates?

USER: My travelling dates are 12/05 to 12/07.

ASSISTANT: May I know your travelling airport codes?

USER: I planned my trip from AUS to LAX.

ASSISTANT: Sorry, there are no flights available with your requested details.

USER: No issue, thank you for your time.

ASSISTANT: Thank you and have a nice day.