Praise her a lot on getting up at night to use the bathroom before asking if she would like to do the same in the daytime.
Sometimes kids get too absorbed in what they're doing daytime to remember to go to the loo. Do they still do training pants for her age for during the day? Sometimes that gives a sense of safety rather than have a parent whi might get angry if the child is wet again.
Takes time but as someone once said to me at this stage - Don't worry, they won't still be doing this when they're 21.