Hello.
user
Hello, how may I help you?
assistant
I am William Clark. I would like to travel from IAD to DFW. Can you please help me to book a ticket?
user
Sure, may I know your trip dates please? Do you have any other requirements?
assistant
My travelling dates will be on Feb 12 to Feb 14. I need a connecting flight with economy class.
user
Ok, please wait.
assistant
I want to depart in the afternoon. Sure, I will wait.
user
Sorry, there is no flight available as per your request.
assistant
Ok, not an issue. Thank you for your information.
user
My pleasure.
assistant