Hello, I am Anna Lopez.
user
Hello, how can I aid you today?
assistant
I would like to book a flight ticket to Oakland, CA - OAK. Can you help me in this?
user
Sure, please share your journey dates.
assistant
my trip dates are 11/14 - 11/16.
user
Ok, may I know your source point?
assistant
I want to fly from Denver, CO  -DEN.
user
Ok, please wait for a while.
assistant
Ok.
user
Sorry to say that, there were no flights found on that route.
assistant
It's ok, not a problem. Thank you for your information.
user
Thank you for choosing us.
assistant