One Life Counselling & Coaching Ltd. Welcomes New Psychologist CALGARY, AB: One Life Counselling & Coaching Ltd., a premier provider of therapy, counselling, and coaching services in Calgary and the surrounding area, is welcoming registered psychologist (provisional) Kristina Dargan to its professional team. Dargan integrates a variety of therapeutic approaches in her work and specializes in concerns related to anxiety, depression, addiction, trauma, anger management, couples counselling, and more.