Updated natural language demo to use new v3.5.0 features.
Updated natural language demo to use new v3.5.0 features.

msft-shahins/BotBuilder,stevengum97/BotBuilder,msft-shahins/BotBuilder,msft-shahins/BotBuilder,stevengum97/BotBuilder,stevengum97/BotBuilder,msft-shahins/BotBuilder,xiangyan99/BotBuilder,xiangyan99/BotBuilder,yakumo/BotBuilder,yakumo/BotBuilder,xiangyan99/BotBuilder,xiangyan99/BotBuilder,yakumo/BotBuilder,yakumo/BotBuilder,stevengum97/BotBuilder