Elizabeth

Jake's buddy has a dog named Izzy.
Apparently Lizzy didn't know this until a few days ago, when we drove by their house and noticed Izzy in the backyard:

Me: "Hey, there's Izzy!"
Lizzy: "What? What are you talking about?"
Me: "Kaleb's dog. Her name is Izzy. She's right there."
Lizzy: "Oh. Well, if his dog is named Izzy then from now on my want to be called Elizabeth. For I don't want anyone to think I'm Kaleb's dog."