Hi, Shirley Lewis here.
Hello, how may I help you?
 I planned to attend for my parents 27th wedding anniversary in DTW, can you book the flight ticket from AUS?
That's so sweet, may I know your journey dates?
Sure, my dates are from 06/02 to 06/04.
Wait for a while.
Ok.
Sorry to say that there is no airline providing service on those dates, Lewis.
That's fine. Thank you for your information.
Thank you for choosing us.