bot.dialog('/', function (session) {


    /*if(session.message.text.toLowerCase.contains('input1') || session.message.text.toLower.Case.contains('input2') || session.message.text.toLower.Case.contains('input3'))
    {
      session.send('Answer');
    }*/

    const userText = session.message.text.toLowerCase();

    String.prototype.is = function() {
        const args = Array.prototype.slice.call(arguments);
        const text = userText;
        for(let i = 0; i < args.length; i++) if(text.includes(args[i])) return true;
        return false;
    };

//Greeting
    if(userText.is('hello', 'hi', 'good morning', 'good afternoon', 'hey'))
    session.send(`Hello. How are you?`);

//Help
    else if(userText.is('help'))
    session.send(`What can I help you with? Do you want to know something specific?`);

//Unrecognized messages
    else
    session.send(`Sorry, I don't understand you. Try to formulate your question differently please.`);
});