here?.rb

print "Wanted to see if you were here today! yes/no? "

def handle_yes
  puts "sweet! What time is good for you?"
  time = gets.chomp
  puts "Right on, I'll see you at #{time}!!"
end

def handle_no
  puts "Sad. Next week it is!"
end

def handle_maybe
  puts "Maybe, eh? Just let me know when is good for you!"
end

def handle_quit
  puts "Goodbye"
end

matchers = {
  yes:   %w[YES Y],
  no:    %w[NO  N],
  maybe: %w[MAYBE],
  quit:  %w[Q QUIT EXIT]
}

while input = gets.chomp.upcase
  if match = matchers.find { |_, matches| matches.include? input }
    break send "handle_#{match.first}"
  end
  puts "That does not compute! Try again: yes/no? "
end