I hate that saying.
Me: why is your system so complicated? And there is no information about it online or anywhere at all. It is quite inconvenient for me to call service centre each time. Sometimes I can't get through. We won't care to memorize it you know, since it's so complicated.
CS: you can check your message history.
Me: ..... *long lecture ensues.
If I wanted sassy remark,
I could have just consulted myself.