Parent child owner - Service Request Bundle

How can I change the owner of the child ticket?
The child ticket requester is SYSTEM, but I want that the child ticket has the same owner of the parent ticket.
Simply because two separate teams will act on this, one in the parent ticket and another team on the child ticket, and they possibly will interact with the client.
Today, with the owner of the child ticket set to be SYSTEM I dont have a conversation with the client.