My pet peeve is when you get the message "Hey, have you got a minute?" You type back "Yeh, sure". And then wait... and wait.... Whenever they do actually ask

My pet peeve is when you get the message "Hey, have you got a minute?" You type back "Yeh, sure". And then wait... and wait.... Whenever they do actually ask the question almost an hour later, I'm always tempted to reply "Sorry, the minute is long gone".