Here is what you do: 

1. Determine precisely what it is you want them to hear,
or perhaps feel. Write down your wish on a piece of paper 
in simple sentence form. 

2. Make a dream pillow using a small square of fabric
and a little batting. Throw in a pinch of lavender and rosemary. 
Put in the piece of paper last, then sew up the end. 

3. Put the dream pillow on your altar. Do an altar devotion 
to center yourself, then create sacred space. Cast a circle 
and call the quarters if you like, but is isn't necessary. 

4. Center yourself, then hold your hands over the dream pillow
and say the following: 

Holy Mother, Goddess Divine, 
I stand before your sacred shrine. 
This person won't listen or hear 
My words tickle at deafened ear. 
Holy Mother, Goddess Divine, 
Send a dream, awaken the mind. 
Through his/her vision he/she lives 
The nightmare/passion/lesson he/she so freely gives. 
Holy Mother, Goddess Divine 
Send them your enchanted design 
Clear out the cobwebs, tear down walls 
Carry my message through spirit calls. 

Feel free to change the incantation to suit your purpose.