We report the variation of the linear and non-linear dielectric constants across the smectic A-smectic CI. smectic C*-smectic I* and smectic I*-smectic F* transitions of a chiral liquid crystal. Clear changes are seen for both the parameters across all the three transitions. Interestingly, at the transition between the two tilted hexatic phases. viz., smectic I* and smectic F* phases, the non-linear dielectric constant shows a steeper variation than the linear one indicating that it is more sensitive to the change of sign of the bond orientational order occurring across this transition.