Hello. Frank Harris here.
Hello. How can I help you?
I will be visiting to Washington IAD, can you check for the flights from OAK?
Sure, may I know your travelling dates please?
My travelling dates will be from 03/25 to 03/27.
Ok, do you need any halt in between the journey?
Yes, 1 stopover is preferable.
Please wait.
Sure.
Thank you for waiting, we found a flight with number 1027 and airline UA at a price of 100 with 1 connection in class economy. Shall I proceed with booking?
Please confirm my reservation.
Sure, your booking is done.
Thank you for helping me.
Thank you for opting us, have  a nice day.