Hi.
Hello. How can I aid you at this moment?
Can you book a flight ticket from OAK to SFO?
Sure, I am happy to help you with that. Can I have your travel dates please?
I want to travel in Aug from 21st to 23rd.
Do you prefer any specific class to travel?
I prefer to fly in economy class.
Are you looking for connecting flight or only direct flight is required to you?
I want to travel in a direct flight.
Do you prefer to travel in any specific timings only?
No. thanks for asking.
Can I have your good name please to proceed further?
I am David Smith.
Ok, please be on hold for a moment to check flight availability.
Sure, take your time.
Sorry David Smith, no direct flight is available to you on  your dates.
That's ok, thank you for your information.
Thank you for choosing us, have a good day.