today at railway station

I was on duty on the railway stattion and saw a street dog going after a person shaking his tail deliberatly as if the dog was very pleased with the person, but the person did not seem to know the dog so he was telling him something but the dog keep following the person after a while a boy who collect used empty bottle and sell them to the passenger after refilling it with station water scared the dog away and i saw sadfully the dog left sadly