Hello.
user
Hello. How can I assist you at this moment?
assistant
I need a business class flight to Charlotte in the month of December to attend an event there. Can you help me in booking a flight ticket from Oakland?
user
Sure, I am happy to help you with that. Can I have your travel dates please?
assistant
Thank you for your concern. My travel dates are Dec 30 and Jan 1.
user
Ok, please let me know the airport codes of your journey locations.
assistant
Ok, my airport codes are OAK and CLT.
user
Do you have any other specifications?
assistant
I need a connecting flight for my journey.
user
Can I have your good name please to  proceed further?
assistant
Ok, my name is Debra Carter.
user
Ok, please wait a moment to check flight availability.
assistant
Ok, sure take your time.
user
Sorry Debra Carter, no flight is available to you in business class on your dates.
assistant
Not a problem, anyways thank you for the information.
user
Thank you for choosing us, have a good day.
assistant