Hi.
user
Hello, how can I help you?
assistant
I am Betty Walker want to visit IAD, can you book a ticket from OAK?
user
May I know your desired travel dates please?
assistant
Sure, my travelling dates will be 01/21 and 01/23.
user
Please wait a while.
assistant
Ok.
user
Sorry to say, there is no flight on your desired travel dates.
assistant
That's ok, thank you.
user
Thank you for opting us, have a nice day.
assistant