Hi.
Hello. How may I aid you?
I am Mary Miller, can you help me to book a flight from IAD to DFW?
 May I know your preferable journey timings?
My travelling dates are 10/01 and 10/03. I want to return at afternoon time.
Sorry, no flight is available for you as per your requests.
No issues, thank you for your time.
Thanks for choosing us.