Hi, Jack Allen here.
Hello, How can I help you?
I have planned to celebrate my son's birthday in Austin, TX - AUS on 01/19. Can you please help me to book a ticket?
May I know the origin  and return date?
My origin is TX - DFW  and have to return on 01/21.
Wait a minute.
OK.
Sorry to tell that there is no flight found according to your requirements. Thank you have a nice day.