I have a friend account she forgot her password and unable to do that

My friend has created her id since a long time her id is *** Email address is removed for privacy *** . she is using facebook with her id she forgot a password of her live id because not login since  a very long time issue is that her no is old and all information is she put while creating this id some information she remembered and some not so whenever she requests for resetting a password some information she might putting wrong information so that's why she is not able to gain access to her id back   . Please anybody help is on this request will be highly appreciated.