Chicken fajitas with cheese and sour cream

Boneless skinless chicken breasts (boneless skinless chicken breast fillets with rib meat containing up to 10% solution of water, food starch and salt.), fajita mix, 8" flour tortillas, shredded cheddar cheese (cheddar cheese (pasteurized milk, cheese culture, salt, enzymes, annatto vegetable color) potato starch, cornstarch, cellulose (anti-caking agents).), sour cream (grade a cultured cream), taco seasoning (sea salt, chili powder, ground cumin, black pepper, paprika, garlic powder, dried oregano, onion powder, crushed red pepper)