Hi, Elizabeth Davis here.
Hello Davis, how can I assist you?
 Can you please help me in booking a flight ticket from OAK to PHX?
Sure, could you please tell me your trip dates?
Ok, my trip dates are 05/19 and 05/21.
Please wait for a while.
Ok, please check for a connecting flight.
Sorry to say you that there is no flight available with single connection on your preferred dates.
Ok, no problem. Thank you for helping me.
You are welcome.