I need some ideas on how to answer this question in a positive way?

Tristan is an indigenous worker at xyz child care. He often takes unpaid leave to attend to family obligations. This is part of his cultural tradition. He has arranged this in advance with the centre director. One morning Tristan is absent. Jess (7) says, 'Tristan is on holidays again. Mum says that aboriginals are lazy.' What could you say to Jess?