Comets excuse :

'Hi, Ma'am you look pretty today.'

'Oh thank you very much <insert name here>. Have you done your homework?'

'Oh, ma'am I was walking with it to school and loooking at it just in case I missed something, but the wind blew it away! Can you believe that? Luckily I've got it saved on my computer so I'll bring it in next lesson.'

Works like a charm.