Having a big sofa bed in the living room, can that room be called Bedroom?

Hi

My property consists of 1 bedroom with a double bed and a living room with a sofa bed for a total of 4 guests capacity. I have noticed that the way booking shows my property is like if it only had one big room where 4 people can sleep all together, while they actually get split between the bedroom (+2) and the living room (+2), each area with a lock and full privacy. 

Is there a way to show that each room can sleep 2 guests separately?

Could I change the living room and call it as a bedroom and the in the description mention that this bedroom is actually a living room/bedroom?

Thank you!