I don't have the game's files on hand, but a
quick search of dialogue:
There should be someone in Kalm who says "Huh? You're looking for your friend? You want to know where the Lifestream is? Hmm, I can't help you find your friend, but I've heard about the Lifestream. When I traveled to the
Southern islands a doctor was very kind to me. [...]"
There should be someone in Icicle Inn who says "You all should get away from here and go to a place like
Mideel Island in the south.[...]"
I think Priscilla will say "Lifestream? Yeah, I know! It's Mr. Dolphin's playground. There's a
Three-taloned island south of the continent[...]"
And I think Bugenhagen says something??? Again, I don't have the game files or game so I can't do a thorough search, view the triggers, or even see
if these dialogues are triggered.