Authors:

It is important to say "sir" at these moments. And if they ever call you by your first-middle-last name, you better watch out. I'm telling you.

Stephen Chbosky (2013). “The Perks of Being a Wallflower YA edition”, p.84, Simon and Schuster
It is important to say sir at these moments. And if they ever call you by your first-middle-last name, you better watch out. I'm telling you.