# check for ZipCode code slot; if not available; elicit it
    zip_code = None
    zipCode = slot_values.get('ZipCode', None)
    if zipCode is not None:
        zip_code = zipCode['value'].get('interpretedValue', None)
    else:
        response = helpers.elicit_slot_with_retries( intent, activeContexts, sessionAttributes, 'ZipCode', requestAttributes)
        return response		
    # check for StreetAddress slot
    street_address = None
    streetAddress = slot_values.get('StreetAddress', None)
    if streetAddress is not None:
        street_address = streetAddress['value'].get('interpretedValue', None)
    else:
        # give the caller extra time for this response
        sessionAttributes['x-amz-lex:audio:end-timeout-ms:' + intent_name + ':StreetAddress'] = 2000
        response = helpers.elicit_slot_with_retries( intent, activeContexts, sessionAttributes, 'StreetAddress', requestAttributes)
        return response
    street_address = parse_address.parse(street_address)
    sessionAttributes['inputAddress'] = street_address

# validate the address using the AWS Location Service
    location_response = locationClient.search_place_index_for_text(IndexName='explore.place', Text=street_address)
    # inspect the response from Amazon Location Service
    if location_response.get('Results', None) is not None:
        for address in location_response['Results']:
            if address.get('Place', None) is not None:
                addressLabel = address['Place'].get('Label', None)
                addressNumber = address['Place'].get('AddressNumber', None)
                street = address['Place'].get('Street', None)
                postalCode = address['Place'].get('PostalCode', None)
                if street is None:
                    continue                    
                if addressNumber is None:
                    continue                    
                if zip_code is not None:
                    if postalCode[:len(zip_code)] != zip_code:
                        continue
                already_tried = False
                prior_suggestions = helpers.get_all_values('suggested_address', sessionAttributes)
                for prior_suggestion in prior_suggestions:
                    if addressLabel == prior_suggestion:
                        already_tried = True
                        break                    
                if already_tried:
                    continue
                # the first entry with a valid street that was not already tried is the next best guess
                resolvedAddress = addressLabel
                break

if (event.get('inputMode') == 'Speech'):
        response_string = '<speak>OK, your new address is <say-as interpret-as="address">'
        response_string += resolvedAddress + '</say-as>. Is that right?</speak>'
        response_message = helpers.format_message_array(response_string, 'SSML')
    else:
       response_string = 'OK, your new address is ' + resolvedAddress + '. Is that right?'
        response_message = helpers.format_message_array(response_string, 'PlainText')
    intent['state'] = 'Fulfilled'
    response = helpers.confirm(intent, activeContexts, sessionAttributes, response_message, requestAttributes)
    return response

RETRY_ACTIONS = [
    { "street_name": {
          "method": elicit_street_name,
          "style": None,
          "no-match": "Thank you. To make sure I get it right, can you tell me just the name of your street?",
          "incorrect": "Let's try again. Can you tell me just the name of your street?"
       }
    },
    { "street_name_spelled_by_letter": {
          "method": elicit_spelled_street, 
          "style": "SpellByLetter",
          "no-match": "Let's try a different way. Can you please spell just the name of your street?",
          "incorrect": "Let's try a different way. Can you please spell just the name of your street?"
       }
    },
    { "street_address_number": {
          "method": elicit_street_address_number, 
          "style": None,
          "no-match": "I didn't find a matching address. Can you please tell me your street address number?",
          "incorrect": "OK, let's try your street address number. Can you tell me that once more?"
       }
    },
    { "street_name_spelled_by_word": {
          "method": elicit_spelled_street, 
          "style": "SpellByWord",
          "no-match": "Let's try one last time. Please spell the name of your street. You can use words for letters, such as a as in apple, or b like bob.",
          "incorrect": "Let's try one last time. Please spell the name of your street. You can use words for letters, such as a as in apple, or b like bob."
       }
    },
    { "agent": {
          "method": route_to_agent, 
          "style": None,
          "no-match": "Sorry, I was not able to find a match for your address. Let me get you to an agent.",
          "incorrect": "Sorry, I was not able to find a match for your address. Let me get you to an agent."
       }
    }
]