answer
sleep(2)
say "Welcome to the King County Christmas Tree Recycling Line."

# Setting up our options for "ask". We accept 5 digits, either spoken or entered
# by DTMF, and time out after 10 seconds.
zipcode_options = { :choices     => "[5 DIGITS]",
                    :repeat      => 3,
                    :timeout     => 10,
                    :onBadChoice => lambda { say 'Invalid entry, please try again.' },
                    :onTimeout   => lambda { say 'Timeout, please try again.' },
                    :onChoice    => lambda { |zip| lookup_facilities(zip.value) }
                  }

ask 'Enter or say your ZIP code to find a Christmas tree facility in your area.', zipcode_options