StartConversation
From The Elder Scrolls Construction Set Wiki
Syntax:
StartConversation TargetActor, TopicID
Example:
StartConversation Joe, SecretTopic StartConversation player, ForceGreetTopic
Use the function to force a conversation between two NPCs, starting with a specified topic. When you call this function on an actor, the actor will seek out the target actor in order to have a conversation, no matter where the two NPCs are currently.
You can also use it to have an NPC "force greet" the player, by setting the player as the TargetActor. The specified topic will be used instead of the normal Greeting topic, so you can have the NPC start the dialogue with any topic you like (use Greeting if you simply want the normal greeting).

