Excuse me, young man?
I hate to bother you...
I can tell you have a lot of work to do, and this is quite a big day for you...
BUT, I was wondering if you've seen my little boy?
You see, he was just here, and then I turned away for a minute and now I can't seem to find him!
Maybe you've seen him?
It's kinda funny.
He looks an awful lot like you.
You just let me know if you run into my little boy, OK?