Coding Help Add a flower dance accepted dialogue for custom NPC?

[moffy]

Hi!

I want to add a dialogue when custom NPC accept to dance with farmer in flower dance festival!

I checked StringsFromCSFiles.xnb and I found the flower dance accepted dialogues here.
But I don't know how to add those dialogues to my custom NPC's...
How to write contents.json about this?

If someone know how, please let me know!
Thanks!