missed a space after the comma (#1400)

Author: salmanmkc

articles/bot-service-overview-introduction.md

@@ -40,7 +40,7 @@ Azure Bot Service and Bot Framework offer an integrated set of tools and service
 ![Bot Overview](media/bot-service-overview.png) 
 
 ### Plan
-As with any type of software, having a thorough understanding of the goals, processes and user needs is important to the process of creating a successful bot. Before writing code, review the bot [design guidelines](bot-service-design-principles.md) for best practices and identify the needs for your bot. You can create a simple bot or include more sophisticated capabilities such as speech, natural language understanding,and question answering.
+As with any type of software, having a thorough understanding of the goals, processes and user needs is important to the process of creating a successful bot. Before writing code, review the bot [design guidelines](bot-service-design-principles.md) for best practices and identify the needs for your bot. You can create a simple bot or include more sophisticated capabilities such as speech, natural language understanding, and question answering.
 
 ### Build
 Your bot is a web service that implements a conversational interface and communicates with the Bot Framework Service to send and receive messages and events. Bot Framework Service is one of the components of the Azure Bot Service and Bot Framework. You can create bots in any number of environments and languages. You can start your bot development in the [Azure portal](bot-service-quickstart.md), or use [[C#](dotnet/bot-builder-dotnet-sdk-quickstart.md) | [JavaScript](javascript/bot-builder-javascript-quickstart.md)] templates for local development.