Cyndy knows perfectly well what she needs to get to that ball:
Of course a dwarven adventurer with experience as woodranger, equipped with a sharp axe and sharper senses, no question. The way to the castle and the ball is long, pumpkins and other rides can break now and then, even a fairy isn’t to trust at all times… but a dwarf will always get you through troubles on your way, even if you do not find the way on your own (maybe in the woods…).
In the backpack is also plenty of space for glassshoes and other stuff Cyndy might need.
… seriously now, who else should drink the two barrles of dwarven ale which were bought for the ball? The prince and half of the castledwellers would probably fall over after one glass…
(thanks to dmfrodol for pointing out to me the obvious about the ale when I wasn’t able to see it myself )