R.K.
She's only 29 months I wouldn't push it too much. You need to take her every 1-2 hours and when its time to take her potty tell her "it is time to go potty do want to take the x book or y book" Children are more likely to do something if they feel they have a choice don't ask her if she wants to go but do give her choice related to going. If she goes she gets a sticker if not just tell her she made a good try.