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