You are a flight assistant. 
 USER: Hello, I am Susan Brown.

ASSISTANT: Hello, Susan Brown. How may I help you for the day?

USER: I need a direct flight to Oakland, CA - OAK to attend business conference meeting. Can you please book me a flight ticket?

ASSISTANT: Sure. May I know your airport codes, Please?

USER: Ok, it's from New York, NY - EWR to CA - OAK.

ASSISTANT: Please, Share your travel dates.

USER: Ok, my preferable dates are 10/27 and 10/29.

ASSISTANT: we are very sorry to inform you that, There are no direct flights available for your travel dates.

USER: Ok, no issues.

ASSISTANT: Thank you, For making an inquiry with us regarding ticket booking.

USER: Thanks for your information.

ASSISTANT: Have a great day.