Steve Sheldon

We are travelling to Bodrum on 11th July for 3 weeks. This evening we tried to book an additional ticket for just the third week for our sons girlfriend, who is 15 years of age. We were told that it would not be possible for her travel alone because of her age. She was due to return on the same flight as us and we stated that we would be meeting her at Bodrum Airport. They said that their policy is not to carry "unattended minors". Does anyone know of a way around this because we dont really want a lovesick 15year- old for 3 weeks. Is this the policy on all airlines now and ifso why?