Hello.
user
Hello, how can I help you?
assistant
I am Jennifer Green. I am planning to visit Washington to meet my father, can you please help me in booking a flight ticket from IAD to SFO?
user
May I know your desired travel dates please?
assistant
My travelling dates are July 24 and July 26.
user
Please wait a while.
assistant
My departure time is afternoon.
user
Do you have any class preference?
assistant
I am comfortable with any class.
user
Sorry to say, there is no flight on your desired travel dates.
assistant
That's ok, thank you for checking.
user
Thank you for opting us.
assistant