Try to find any tangential experience you have with the program. If you don't really have any, compare it to a similar program you've been to. Employers are looking for more than just experience. They value candidates who demonstrate potential, adaptability and a strong will to learn.
Faced with the question, “why should we hire you without experience? , focus on your academic accomplishments, your social skills, your volunteer work, and any extracurricular activities that highlight your abilities and how they can benefit the company. Express your enthusiasm for the position and the new perspective you bring. I will take seriously whatever task is assigned to me. I understand that to be good at something I must first learn all the ins and outs of the job. I think I would be very proud to be part of a team that offers excellent customer service.
It will motivate me to strive to meet your company's objectives time and time again. My boss was pleasantly surprised when he arrived early that Monday to do the same.