"Excuse me, ma'am"

You're being polite. The nurse brightens up as she sees you, because she loves all human beings.

This makes you very calm.

"Where do I find my dying uncle?" you ask, while trying not to laugh out loud.

She answers in what seems to be a riddle:

"These boots are made for walking
And that's just what they'll do
One of these days these boots are gonna walk all over you"