You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Could you book my ticket from AUS to LAX?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: My trip dates are Feb 25 and 27.

ASSISTANT: May I know your name?

USER: Kimberly Thomas here.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: No problem, thank you.

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