Couple didn’t thank me for catching their dog after it almost got hit by a bus

This happened today and mildly annoyed me.

So I was out for a walk and I was out I saw this lady and a man come out from their garden following their dog that had clearly gotten out. Neither were putting in much effort to get the dog the lady was just standing and watching while the man casually walked after the dog not making much effort to try and grab it despite it running across the road.

The dog ran across the road again and almost got hit by a bus, it then proceeded to run up to me and I grabbed it to not let it run into the road again. The lady comes up to me to retrieve her dog, takes it and proceeded to walk off like nothing had happened the guy then recrosses the road and follows her back to their house completely ignoring me.

I understand it’s a scary moment having your dog almost run over and I wasn’t expecting anything but a simple thank you would be nice.