Hello,. I am Angela Lewis.
Hello, how may I help you?
My friends are planning to visit Alcatraz Island in San Francisco, SFO.
Sure, can I know your preferable dates?
Can you please book a flight ticket with connecting flight? My journey dates on 02/25 and 02/27.
Ok, let me know your origin airport code?
My source  point is Denver, DEN.
Sorry, there are no flights available for given dates.
Ok, no problem. Thank you for your information.
Thank you for contacting us, have a great day.