Hi, I am Debra Lewis.
Hello, how could I assist you?
I need to book a flight ticket from JFK on 09/21 to SFO on 09/23, as I am  going to meet my family on a holiday trip.
Just a moment, I will let you know the information.
Ok.
We are very sorry to notify you. Unfortunately no flight found on given details.
Ok, thank you for your information.
Thanks for approaching us.