Whether the position you are interviewing for actually has direct reports or not, any HR professional has managerial duties, and your interviewer is looking to hear from you what you feel your style of managing. Before your interview, you need to research the different management styles and consider what style would best describe the type of manager you are. You can always be a hybrid of the different management styles. In the end, make sure that your interview walks away from your interview, knowing what type of manager they would be hiring if they offered you this role.