Are you honest and say the real reason why you can't make work?
I do, but always feel as though it sounds so flaky. I've only ever had to do it twice, and anyway I would have to be on my death bed before phoning in sick (I'm self-employed so no show, no pay!), so v.v.rarely let people down. it's not the nanny's fault, these things can't be helped, but I somehow struggle with the phoning into work convo.