Hello.
user
Hello, how can I help you today?
assistant
My name is Richard Hall. I want to book a ticket from Detroit-DTW  to visit my home town Chicago-ORD.
user
Sure, may I know your travel dates?
assistant
My departure date is on 12/07 and return from Chicago on 12/09.
user
Sorry Hall, I did not find any flight basing on your details.
assistant
That's ok, thanks for your help.
user
Thank you for reaching us.
assistant
You are welcome.
user