Retry message if bot is idle more than 1 hour

Question

i have migrated my bot from v3 to v4 i have made configuration settings "always on" also but if bot is idle more than 1 hour i am getting retry message.

could you please provide the solution i have used blobstorage for state.

please find the below code.

Global.asax.cs code

 string botdialogstorage = ConfigurationManager.AppSettings["BotDialogStorageContainer"];
            string storageConnectionString = KeyVaultManager.GetKeyVaultSecret(CDPOSConfigurationManager.GetAppSetting("StorageConnectionStringSecret"));
            CloudStorageAccount storageAccount = CloudStorageAccount.Parse(storageConnectionString);
            CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
            CloudBlobContainer container = blobClient.GetContainerReference(botdialogstorage);
            AzureBlobStorage _myStorage = new AzureBlobStorage(storageConnectionString, container.Name);
            // Create Conversation State object.
            // The Conversation State object is where we persist anything at the conversation-scope.
            var conversationState = new ConversationState(_myStorage);
            builder.RegisterInstance(conversationState).As<ConversationState>().SingleInstance();

            // Register the main dialog, which is injected into the DialogBot class
            builder.RegisterType<RootDialog>().SingleInstance();

            // Register the DialogBot with RootDialog as the IBot interface
            builder.RegisterType<DialogBot<RootDialog>>().As<IBot>();

            var container1 = builder.Build();
            var resolver = new AutofacWebApiDependencyResolver(container1);
            config.DependencyResolver = resolver;