Lost Golden Retriever in East Launceston

My dog was lost this afternoon around 3-4pm. Last seen was at Abbott Street, East Launceston at our home. He is golden retriever and 8 years old His name is Derek - around 30kg and golden colour. Could please help spread around? We been outside looking for him couple hours with no luck. He is microchipped and desexed. Not wearing any collar when run away. He run away from back yard. Registered with Knox council at Melbourne as we recently moved to Launceston. PHONE: 0468 939 416