Hi.
user
Hello. How can I help you?
assistant
Can you help me to book a flight from SFO to OAK?
user
Let me know your travelling dates.
assistant
My travelling dates are 12/01 and 12/03.
user
Do you have any preference?
assistant
I prefer business class to travel.
user
Can I know your name?
assistant
Sure, my name is Robert Smith.
user
Sorry, no flights found for your travelling dates.
assistant
No issues, thank you for your time.
user
Thank you.
assistant