Hi.
user
Hello, How can I best serve you today?
assistant
Could you please help me to book a flight ticket from DCA to IAH?
user
Sure, can you please mention your depart and arrival dates of your journey?
assistant
My trip dates are Jan 22 and Jan 24.
user
Do you like to go with a connecting or direct flight?
assistant
I need  a direct flight.
user
Can I know your good name to proceed further?
assistant
I am Pamela Edwards.
user
Sorry, no flights are available in this route as per your requested dates.
assistant
Not a problem, thank you for the information.
user
Thank you for choosing us.
assistant