Hello, I am Brian Wilson.
user
Hello. How can I help you now?
assistant
I need a direct flight to attend a client meeting in Oakland, so please book a flight ticket from Chicago.
user
Sure, may I know your travel dates please?
assistant
I want to fly on July 15, return on July 17.
user
May I know your airport codes please?
assistant
My source and destination airport codes are ORD and OAK.
user
Ok, please wait.
assistant
Sure, I need a business class.
user
Ok. Sorry, there are no flights as per your requirements.
assistant
Ok, no problem. Thank you.
user
Thank you for opting us.
assistant