Hi.
user
Hello. How may I help you?
assistant
I am Katherine Taylor, can you help me to book a flight from IAD to SFO?
user
Ok, can I have your travelling dates to get a flight for you?
assistant
My travelling dates are 07/13 and 07/15.
user
Wait a moment please.
assistant
Sure, take your own time.
user
Sorry to inform you, there is no flight found on your route to book a ticket for you.
assistant
It's ok, thanks for your information.
user
Thanks for reaching us, have a good day.
assistant