Formal mentoring relationships are set up by an administrative unit or office in a company or organization, which solicits and recruits qualified individuals who are willing to mentor, provides training to the mentors, and helps to match the mentors with a person in need of mentoring. While formal mentoring systems contain numerous structural and guidance elements, they usually allow the mentor and mentee to have an active role in choosing who they want to work with. Formal mentoring programs that simply assign mentors to mentees without allowing input from these individuals have not performed well. Even though a mentor and a mentee may seem perfectly matched "on paper", in practice, they may have different working or learning styles. As such, giving the mentor and the mentee the opportunity to help select who they want to work with is a widely used approach. For example, youth mentoring programs assign at-risk children or youth who lack role models and sponsors to mentors who act as role models and sponsors.