Customer: "John sent me a new PC as mine was playing up, but I cant use the green and purple cables they don't fit!"
Me: "Do you mean the keyboard and mouse cables?"
Me: "On the back of the PC is there a green and purple socket?"
Customer: "I don't know! I cant work!"
Me: "You will have to help me so I can help you, if you cant tell me I cant help can I?"
Customer: "No there is no purple socket!"
Me: "Ok so it's a USB only machine, you'll need a USB keyboard and mouse."
And thank you too.