This Isn't My Story

"Kai," a rugged voice says from behind me followed by footsteps. I look behind me to see a tall man towering over me.
"I think you made a mistake I'm not Kai," I said after looking behind me to make sure he was talking to me.
"I'm not the one who's mistaken," He says while walking over to the benches and sitting. My hands start to sweat as I notice he doesn't have a number. Who the hell is he? Why doesn't he have a number?
"You must've noticed by now I don't have a number," he says while putting his arms on the armrest of the bench. We sit in silence for a few minutes before a break the silence with a slight chuckle.
"Look dude, I don't know who Kai is or what numbers you're talking about but I gotta go," I say while walking back towards the road.
That was so weird. How does he know about the numbers? Who the hell is Kai and more importantly, I pause before looking back to where the strange man was but he's gone. Who was that?