Bring a salted pot of water to a boil. Simmer the chicken until it reaches an internal temperature of 160°. Remove from water and dice into small chunks. Place in the refrigerator to cool fully.
Once the chicken is cooled fully mix it with celery, onion, mayo, walnuts, cranberries, salt & pepper.
Warm the wrap on both sides in a nonstick pan on medium heat if desired.
Layer the wrap with spring mix, tomato, and chicken salad. Fold in the ends and roll up tight. Cut in half. Serve with chips and pickle.