PizzaConversation.php

<?php
namespace Mpociot\SlackBot;

class PizzaConversation extends Conversation
{
    protected $size;
    protected $topping;

    public function askSize()
    {
        return $this->ask('What size do you want?', function($answer){
            $this->size = $answer;

            $this->reply('Okay - you get a '.$answer.' pizza.');
            $this->askFlavor();
        });
    }

    public function askFlavor()
    {
        return $this->ask('What topping do you want?', function($answer){
            $this->reply('Okay - you get '.$answer.' on top of your '.$this->size.' pizza.');
        });
    }

    public function run()
    {
        $this->askSize();
    }

}