Hello, I am Brenda Clark.
user
Hello, what service are you  looking for?
assistant
I have a plan to go for Beer festival at Minneapolis, please book a flight ticket under price 1000.
user
Sure, may I know your trip dates?
assistant
My travelling dates are from 03/23 to 03/25.
user
What are the source and destination airports?
assistant
My source code is DCA and the destination code is MSP.
user
Please wait for a while.
assistant
Ok.
user
I am sorry to inform you that we don't have any flights available at this moment on your given criteria.
assistant
No problem, thank you for the information.
user
Thank you for checking with us.
assistant