Mediation at lok adalat

She has to request the family court to refer the case to Legal Services Authority or if the case is not filed approach Legal Services Authority, with a Prelitigation conciliation petition.

If the case is pending, you may request the concerned Court. Else, you may file an application to the concerned Legal Service Authority. 

A simple applicatopn will serve the purpose. There is no format prescribed.

Please appreciate the fact that Lok Adalat is different to Mediation, as Lok Adalat is governed by Chapter VI Section 19 to 22 of Legal Services Authorty Act, 1987, whereas mediation being an alternated disputes redressal system under Section 89 of the Code of Civil Procedure, 1908, be clear which one do you prefer.