Add command not found

app.js

@@ -494,6 +494,10 @@ let kara = new Vue({
                 this.botMessage(this.checkForCommands(message, 'say'))
             }
 
+            if (this.isTyping) {
+                this.botMessage('Command not found');
+            }
+
             this.lastMessage = message;
         },
         checkForCommands(message, commands) {