Hi.
user
Hello. How can I  help you?
assistant
I am Catherine Collins. Can you find a flight for me from OAK to LAX?
user
Your travelling dates please?
assistant
Ok, my trip dates are from 01/14 and 01/16.
user
I am sorry no flights found on your route.
assistant
It's ok, thanks for your information.
user
Thank you for choosing us.
assistant