Srinagar, Jul 1: Mirwaiz Umar Farooq on Wednesday said he has joined a joint appeal advocating the revival of India-Pakistan dialogue, asserting that sustained engagement between the two countries is essential for lasting peace in the region and for the people of Jammu and Kashmir. Mirwaiz said he signed the appeal because dialogue between India and Pakistan is "not only desirable but necessary" for ensuring peace and stability. He also appreciated the initiative of O.P.