1: In a small bowl, combine the Greek yogurt, ranch dressing, cilantro, and salt & pepper to taste.
2: Place tortillas on a clean flat surface.
3: Top each tortilla with 1/4th of the chicken, avocado, tomato, and shredded cheese.
4: Drizzle with a few tablespoons of the yogurt/ranch sauce and roll tightly.
5: Secure with a toothpick if necessary.
6: Enjoy!