Cold hard cash.

"I want money a ton of money, gold, gems, coins anything as long as it's valuable."

"What a greedy hero, but that's to be expected. We'll pay you after you slay the dragoness."

"Wooo money."

The princess and queen look at you weird but you don't care. When you inevitably get sent back home you at least want something you can take back. Gems and gold are still valuable back home so why wouldn't you pick treasure.

"We don't even know your name but we know you're a treasure grabber at least."

"Oh yeah my names Kira."

"Very well now that that's done you must decide who will accompany you on your journey."

The queen claps and three girls walk into the room.