Hello. Betty Williams here.
Hello, how may I help you?
I am planning to book a flight ticket from IAD to LAX.
Sure, may I know your preferable dates?
My preferable travelling dates are from 08/18 to 08/20.
Yes, I found  a flight-1015 with Delta airlines, can I proceed?
Yes.
Yes, your ticket is confirmed.
Thank you.
Thank you for contacting us.