How to find a guy i met only one time at the bus stop?

On my way back to my office from a meeting, I met a guy at the bus stop. Our eyes met, he then wave his hand to me, and keep looking at me while we’re moving on a different direction.
I smiled and waved back to him. But, because I was too shy, I walk faster than I ussually do.
I don’t even know his name, where he’s going, and what’s he do.
Please help me to find this guy… :(