Hello.
user
Hello.
assistant
I am Brian Hill.
user
How can I help you out today?
assistant
I am planning to visit DEN to meet my brother, can you please find a flight from OAK?
user
May I know your travelling dates please?
assistant
Sure, my travelling dates are 09/29 and 10/01.
user
Sorry, there is no flights are  available on your desired dates.
assistant
That's ok, thank you for checking.
user
Welcome Brian Hill.
assistant