Preheat oven to 425º F. Spray a baking sheet with cooking spray.
In a medium sized bowl, combine chicken, enchilada sauce, green onions, Greek yogurt, olives, cumin, salt and cheese. Stir to combine.
Put about 1/4 cup filling down the middle of each flour tortilla and roll. Place seam sides down on baking sheet.
Spray rolled taquitos with cooking spray. Place in preheated oven. Bake for 15-20 minutes, or until tortillas are golden brown and toasted.
In a small bowl, mix together some ranch dressing and taco sauce until desired flavor. Serve with taquitos and enjoy!