Hello.
user
Hello. How may I aid you?
assistant
Jack Collins here. I want to attend a Marriage in San Francisco. Can you please help me for booking the flight ticket?
user
Sure, I can help you and  may I know your preferable travel dates?
assistant
My travelling dates are 03/18 and 03/20.
user
May I know your regional airport codes?
assistant
My airport codes are PHL and SFO.
user
Thank you for your information, there is no flight found on your journey dates to book a ticket.
assistant
Anyway, thanks for the information.
user
You are  most welcome and have a nice day.
assistant