Tzatziki Chicken Salad

Ingredients:2/3 cup plain 2% reduced-fat Greek yogurt1/4 cup finely chopped red onion1 tablespoon fresh lemon juice2 teaspoons chopped fresh dill3/8 teaspoon kosher salt1/4 teaspoon freshly ground black pepper1 cucumber, seeded and shredded1 garlic clove, minced2 cups shredded skinless, boneless rotisserie chicken breast3 ounces multigrain pita chipsMixed Greens Salad