This may be a great opportunity to demonstrate your perseverance, tact and diplomacy. The interviewer may well be interested in assessing you and is giving you an opportunity to demonstrate your prowess as a leader. What they are really trying to establish is how well you can use your emotional intelligence to encourage people to perform and behave in the required manner to achieve the organisations aims and goals. It is important therefore to be sure that any examples you relate have preferably, a positive outcome to helping the people concerned to behave in a manner that helps the organisation to achieve its goal.