Hi.
Hello, how may I aid you?
Help me in booking a flight  from AUS to LAX?
Sure, I am here to help you out. Please provide me your trip dates.
I like to travel on Oct 13 to 15.
May I know your name to proceed further?
I am Dennis Hernandez.
Sorry  Dennis Hernandez, there is no flight as per your request.
That's ok, thank you.
Thank you for reaching us  Dennis Hernandez.