While complex dialogs with NPCs are typically accomplished using the missions system and broadcast chatter is done using AI scripting we can configure some basic chat dialog elements by using the chat_parameters option within World Editor. You will find this if you navigate to a specific NPC bot within World Editor and open its properties. You can also do this for a group at the npc_group level using bot_chat_parameters.

These parameters are configured in a sort of "key / value" pair fashion.

Valid Chat Actions