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// Setup help system
bot.recognizer(new builder.RegExpRecognizer('HelpIntent', /^(help|options)/i));
bot.dialog('helpDialog', function (session, args) {
    switch (args.action) {
        default:
            // args.action is '*:/help' indicating the triggerAction() was matched
            session.endDialog("You can say 'flip a coin' or 'roll dice'.");
            break;
        case 'flipCoinHelp':
            session.endDialog("Say 'heads' or 'tails'.");
            break;
        case 'rollDiceHelp':
            session.endDialog("Say the number of dice you'd like rolled.");
            break;
    }
}).triggerAction({ matches: 'HelpIntent' });