Just wave to get Amity up unless you have Artisan 2+ Trading for the required knowledge to converse.

oh, you can get the first knowledge quest easy enough, but to talk with her, you need 4 General Goods, 4 Soldiers of Dreighan, and 4 Residents of Dreighan. I will post when I know them all but the soldiers are easy enough to get. Just click on the links for the lists. The Dreighan Adventure Journals 1 and II are a wealth of knowledge but will take awhile to get all. Lots of quests in there as well.

UPDATE: Her thing is the Drieghan General Trade Goods. I don't know the order or what works best but I learned all 12 and then just focused on the things girls would like. My Amity with her is well over 1000 now.

This is what works for me:

Sky Hawk Kite Set
Khalk Skin Fabric
High-quality Liquid Fertilizer
Aro's Special Basket

Still a bit of RNG though.

In order to use "Conversation" with this NPC you need to first go to Tikara and get knowledge of the goods by just chatting to him.
What worked for me is:
- Karl Verdun Lumbering Handbook
- Sawdust Box
- Sky Hawk Kite Set
- Aro's Special Basket
Keep in mind that it's very very rng and if you have enough energy pool on few chars, it's probably faster to just cheer her.
Also suggested to use Amity Elixirs