Hello.
user
Hello. How may I help you?
assistant
I am planning a trip to Washington city, can you please book me a ticket from HOU to DCA?
user
On which date you like to travel?
assistant
My preferable journey dates are from 10/08 to 10/10.
user
May I know  your name pleas?
assistant
My name is Charles Robinson.
user
I am sorry no flights found on your dates.
assistant
Ok, not an issue. I will find any alternate for this trip. Thank you for providing information.
user
Thank you for choosing us.
assistant