Hello Ritesh,
on CA 7 CAL2JCL library you can find several sample JCL members. One of these ones is AL2DBORG, which can be used to perform an Online REORG on the CA 7 database. Please read the comments on that member for details.
On the same library you can find AL2DBFRG member, used to reclaim unused space in the Index area (IXX) of the same database.
Umberto