Often to fastest way of getting one over a bout of mild discomfiture is to just carry on without drawing excessive attention to it.

Dumbledore merely smiles and sits and pours the tea.

"Yes. I have always said that the kitchens of Hogwarts are unequalled anywhere. I maintain it's the constant challenge of feeding a very large and energetic audience."

Teenagers.

Dumbledore passes over a teacup.

"How does it feel to be of age, Miss Evans? My seventeenth is so far in the distant past, I fear I rather forget what it was like."