Hello.
user
Hello, how may I help you?
assistant
I am Catherine White, want to travel from DTW to DCA. Please help me.
user
Sure, may I know your trip dates please?
assistant
My trip dates are from 04/01 to 04/03.
user
Sorry to inform you, there is no flight available as per your request.
assistant
It's ok, thank you.
user
Most welcome.
assistant