Hello.
Hello. How may I assist you?
Can you please help me to book a flight ticket from IAH to DCA?
Sure, I am here to help you out. May I know your travelling dates please?
My travelling dates are Feb 14 to Feb 16.
Can you please share your connection limit?
I need a single connection of flight.
Is there any class preference?
No.
May I know your name please?
Nicholas Edwards.
Do you have any specifications?
I prefer to fly in big brand airlines.
Nicholas Edwards,  there are no flights available in your route.
No problem, thanks for your information.
Thank you for reaching us.