It would be great if we could develop a bot to call them and ask them about upgrade availability. "Dear valued Delta customer service representative, please confirm if there is upgrade space available on flight DL41 on December 1 2013. Press 1 if there is space, Press 2 if there is no space, press 3 if you need more time..... .... .... Dear valued Delta customer service representative, , please confirm if there is upgrade space available on flight DL42 on December 1 2013. Press 1 if there is space, Press 2 if there is no space, press 3 if you need more time..... "