Hello.
user
Hello, how may I help you?
assistant
Myself Kimberly Collins. Can you please help me in booking a flight ticket from DCA to  DFW locations?
user
Sure. Please send your travelling dates.
assistant
My travelling dates are from 08/23 and 08/25.
user
Sorry, there is no flights available on your route.
assistant
It's ok. Thank you for the information.
user
Thank you for reaching us.
assistant