He listed his time volunteering in a hospital on his resume, even though it wasn't a job, because it is somewhat relevant experience and shows passion for the industry. (halliecrawford.com)
I bring passion for the industry, a fun, and positive attitude and an strong understanding of customer service. (livecareer.com)
Something along the lines of «I believe my experience, skills and passion for the industry makes me the ideal candidate for this opening» will go down a treat. (allaboutcareers.com)