Deaf Grandma Class-based refactoring

grandma.rb

class Grandma
  # returns true if the string
  # is all caps
  # otherwise returns false
  def shouted?(string)
    string == string.upcase
  end

  # returns true if you say "GOODBYE"
  # otherwise returns false
  def saying_goodbye?(string)
    string == "GOODBYE"
  end

  def said_nothing?(string)
    string.empty?
  end

  def converse
    goodbye = 0
    until goodbye > 1 do
      response = gets.chomp
      if saying_goodbye?(response)
        goodbye = goodbye + 1
        if goodbye < 2
          puts "LEAVING SO SOON?"
        end
      elsif said_nothing?(response)   #response.empty?
        puts "WHAT?!"
      elsif shouted?(response)
        puts "NO, NOT SINCE 1946"
      else
        puts "SPEAK UP, KID!"
      end
    end
    puts "LATER, SKATER!"
  end
end
grandma = Grandma.new
grandma.converse