3 O'clock Non-meeting

I know very well that me Grandpa Joe would lose his temper too quickly. But damn, some days I understand why he did.

A customer called me yesterday asking about a part, which I have in stock. Upon telling him that the guy asked, "Will you be in your shop around three o'clock?" 

It was not an unfair question. As we do route sales as well as pickup and delivery, we don't really have set hours these days. "I plan on it, but if you're telling me you're coming at three I'll make sure to be here then."

"That's just it, Cosgriff. I'm busy, and I don't where I'll be at three."

In my mind, I hit the ceiling. I was instantly, mentally infuriated. "Why the hell are you asking me if I'll be available at three if you don't know you'll be able to come at three?" Instead I replied through gritted teeth, "Just call me when you're on your way."

I mean, really. You're asking me to commit to a time you can't commit too? 

Sometimes Joe was right to lose his temper. I think sometimes we all are.