Hello.
user
Hello. How can I  help you?
assistant
Margaret Jackson here. I would like to book a flight ticket to visit Denver. Can you help me for booking a flight ticket from DTW to DEN?
user
On which dates your planning to travel?
assistant
My travelling dates are July 15 and July 17.
user
I am sorry no flights found on your route.
assistant
That's ok, thank you for checking.
user
Thank you for choosing us.
assistant
Welcome.
user