Hi.
user
Hello.
assistant
I am Brian Green.
user
How can I help you?
assistant
Can you please search a flight ticket from OAK to SFO?
user
May I know your travelling dates please?
assistant
My travelling dates are 06/26 and 06/28.
user
I am sorry no flights found on your preferable dates.
assistant
Thank you for your help.
user
Most welcome.
assistant