I was parked near "A Deep Hole" managing inventory, when I saw some floating text above it through the inventory window. There was no audio with it. I exited out to look, and saw "Faith. Care. All the love I can't repay". I haven't been able to duplicate it, so I'm going to chalk it up to a bug.
The only other dialog I've found is when you use a potion of animal speaking before interaction.
