Could you

You moved away from your parents to another city, 3 months passed and you decided to visit them. You bought a train ticket. A platskart for 2 seats, you took one seat and the other was free. You got on the train, there were a couple of minutes left before its departure, and your neighbor in the cabin was not there. You were happy thinking that you would go alone and no one would bother you, but suddenly a man comes in and asks:

• Hello, this is seat 52A, right?