Hello, myself Andrew Hill.
user
Hello, how may I assist you?
assistant
I would like to book a flight ticket to IAD from DTW, can you please help me with that?
user
Sure, may I know your planned travel dates please?
assistant
Sure, my planned travelling dates are 12/23 and 12/25.
user
Sorry for the inconvenience, there is no flight available on your requested dates.
assistant
It's ok, thank you for the information.
user
You are welcome.
assistant