Hi.
user
Hello, how may I help you?
assistant
I want to book a ticket from IAH to IAD, can you help me?
user
Sure, may I know your trip dates please?
assistant
My travel dates are 09/24 and 09/26.
user
Do you have any other requirements?
assistant
I need a direct flight.
user
Ok, can I know your name please?
assistant
I am David Miller.
user
Sorry, we regret to inform you that there is no flight available as per your request.
assistant
No problem, thanks for checking.
user
Most welcome.
assistant