Hello.
user
Hello. How can I aid you?
assistant
I am Robert Hill. I want to book a flight ticket to DEN from OAK. Can you help me out?
user
Sure, I can help you. May I know your travelling dates?
assistant
My travelling dates are from 05/18 to 05/20.
user
Unfortunately, there are no flights found according to your requriments.
assistant
Ok, No problem.
user
Thank you.
assistant
Thank you.
user