Coat nonstick skillet with nonstick cooking spray. Add bacon; cook until crisp, about 4 minutes.
Beat eggs, sour cream, salt and pepper in bowl until smooth; add chives. Add to skillet. Reduce heat to medium-low; cook, stirring, until eggs are set, 5 minutes. Remove from heat.
Heat tortillas according to package directions.
Stir sour cream, milk, chives and salt in small bowl.
Spoon 1/3 cup egg mixture down center of each tortilla. Roll tortillas up; place, seam side down, on serving dish. Spoon sauce over tortillas.