Whisper On The Wind

You pick a leaf or petal off of a plant, and it magically grows back. You choose a target, and whisper a message (that only you can hear) into the leaf/petal. It becomes invisible to everyone except the caster and target. The leaf/petal floats though the air, as if drifting on an imaginary breeze. It lands on the target, transferring the message into their mind. They can freely and silently respond within their mind, and the leaf/petal floats back to the caster, transferring the response to them. The leaf/petal then crumbles into a magical dust.

You can cast this spell through solid objects if you are familiar with the target and know it is beyond the barrier. 1 foot of stone, 1 inch of common metal, a thin sheet of lead, or 3 feet of wood blocks the spell. The spell doesn't have to follow a straight line and can travel freely around corners or through openings.