Hello.
user
Hello. How can I help you today?
assistant
My name is Cynthia Clark. I have a plan to meet my friend in Washington, can you help me for booking a flight ticket?
user
Sure, can you please share your airport codes?
assistant
My travelling airport codes are from  DCA to ORD.
user
Please share your trip dates too.
assistant
My travelling dates are from 10/23 till 10/25.
user
Sorry, no flights are available on your route.
assistant
That's ok, thank you for checking.
user
Welcome, have a nice day.
assistant