You saw a small point that moved across the sky. That does not mean it was a space station. It could have been anything for all you know.
Assuming he did see a dot and wasn't using a telescope big enough to resolve it (it takes only a modest telescope suitable for amateur astronomy to do this, and it's done quite often by amateurs), let's think about this, shall we?
The ISS is the brightest man-made object in orbit, and very easy to recognize when it passes above the horizon while illuminated by the Sun - within a couple hours before sunrise or after sunset. At an orbital height of about 400 km, it will be above the horizon from locations within about 1,600 km of the point below its location, say 1,000 km for a "good" pass, at least moderately high in the sky. This means that there's a swath about 2,000 km wide where it is theoretically visible. If this includes populated places at the right time of day and the weather is clear it can easily be seen from the ground by many people along a long track 2,000 km wide. There's enough interest in it that people do look for it. If it
didn't appear at the time and position predicted, you'd hear about it.
It's a distinctively bright object moving at a particular speed in a particular direction along a specific track against the background sky, visible over a vast area according to a predictable schedule. So what else could it be?