gistfile1.rb

class Granny
  attr_reader :name

  def initialize(name)
    @name = name
  end
end

class Conversation
  attr_reader :grannys

  def initialize
    @grannys = []
    @phrases = []
  end

  def random_granny
    @grannys[rand(@grannys.size)].name
  end

  def add_response
    @phrases << yield
  end

  def get_response
    @phrases[rand(@phrases.size)]
  end
end

conversation = Conversation.new

conversation.grannys << Granny.new('Kara')
conversation.grannys << Granny.new('Milda')
conversation.grannys << Granny.new('Abby')

conversation.add_response { 'Can\'t you see I\'m watching tely?!' }
conversation.add_response { "NO NOT SINCE #{1930 + rand(21)}" }
conversation.add_response { 'Kill one man, and you are a murderer. Kill millions of men, and you are a conqueror. Kill them all, and you are a god' }
conversation.add_response { "I don't know so you'll better ask #{conversation.random_granny}..." }

puts 'Whats on your mind?'

until (input = gets.strip!).eql?('BYE')
  puts "#{conversation.random_granny}: #{conversation.get_response}!" unless input.empty?
end

conversation.grannys.each { |granny| puts "#{granny.name}: BYE!" }