Quote from the episode A Loaf of Bread and a Grand Old Flag
Pete: Happy Hearth Home Bakeries, this is Pete. How can I help you?
Sheldon: Hello, Pete. My name is Sheldon Cooper, and I would like to know what changed in your white sandwich loaf to make it taste different?
Quote from the episode Teenager Soup and a Little Ball of Fib
Sheldon: [coughs] I don't feel well.
Mary: What's wrong, baby?
Sheldon: I don't know. I just feel awful.
Mary: Well, there is something going around. Billy Sparks got some kind of bug.
Sheldon: That is consistent with what I said. Good. [weak cough]
Mary: You're staying home today. I'll go make you some tea.