Hi, I am Catherine Collins.
user
Hello,. How may I help you?
assistant
I want to travel from Detroit to participate in a food festival at Washington. Can you help me book a direct flight?
user
Please provide your travelling dates.
assistant
I will start on 08/05 and end on 08/07.
user
Please specify your travelling airport codes.
assistant
My trip is from DTW to IAD.
user
No flight is available with your requirement.
assistant
Ok, thank you for the information.
user
Thanks.
assistant