Jon was a bit stunned. He just wanted to experiment a little, and ended up hearing such a conversation.
The content of the conversation was not important; what mattered was that he could actually understand the chat between the Dream Plant Fairies!
Such dialogue was extremely subtle. It wasn't about acquiring information through sound symbols, but rather direct exchanges in consciousness.
When Jon was young, he watched a holographic movie about high-level extraterrestrial life arriving on Earth. In one scene, humans found they could communicate seamlessly with aliens, and the mode of communication was through the mind.
On Earth, this could only be a futuristic interaction concept for movies. Now, it appeared right in front of Jon.
The wave of consciousness from the two Dream Plant Fairies continued to spread outward, and simply by sensing their consciousness waves, Jon understood their intended messages.