One issue to consider is wheather the chip is being restored for cosmetic reasons only.If it fairly small and doesn`t bother you from that standpoint,maybe doing nothing other than smoothing it out is a logical way of solving the problem.The incisal edge is a tough place to keep a filling.If it isn`t sensitive and doesn`t bother you ,leave it be.Other wise I would fix it for no charge if i were him,as a
PR gesture.