Do you have a picture of the person, plus name & DOB?
If you do then print out the picture, on the back write the persons name & DOB, then write a petition that you want them to visit a specific location at a specific day & time.
Then using a purple candle (dressed with commanding oil), carve the same petition on one side of the candle, then the persons name on the opposite site.
Candle in a holder, ontop of the forehead in the picture, light it, some incense, and speak through the incense to the candle speaking the petition, but say "I need to visit..." rather than "You need to visit...."
Do it closer to the time your going, if you can when the person is asleep as it will affect them more.