Cook the chicken breasts in olive oil over medium heat until fully cooked.
Season the chicken with garlic powder and onion powder; mix well.
Dice the cooked chicken and combine it with the ranch dressing.
Prepare the other ingredients: slice avocado, shred lettuce, and dice tomatoes.
Assemble the burrito: place a generous spoonful of the chicken mixture on a tortilla, then top with avocado, cheese, lettuce, and tomatoes.
Fold in the edges and roll the tortilla tightly around the filling.
Serve immediately, or heat in a skillet for a crispy texture.