old_contents: #!/usr/bin/env python
  # encoding=utf8
  from __future__ import print_function
  from flexbe_core import EventState, Logger
  from flexbe_core.proxy import ProxyServiceCaller
  from flexbe_core import EventState, Logger
  import rospy
  from wm_nlu.srv import RestaurantNLUService, RetaurantNLUServiceRequest
  
  
  class SaraNLUrestaurant(EventState):
      '''
      Use wm_nlu to parse a sentence and return the answer.
      ># sentence         string      sentence to parse
      #> answer           string      answer
  
      <= understood       Finished job.
      <= not_understood   Finished job but no commands detected.
      <= fail     Finished job but sentence not successfully parsed or service unavailable.
      '''
  
      def __init__(self):
          # See example_state.py for basic explanations.
          super(SaraNLUrestaurant, self).__init__(outcomes=['understood', 'fail'], input_keys=['sentence'],
                                           output_keys=['answer'])
  
          self.serviceName = "/Restaurant_NLU_Service"
  
          Logger.loginfo("waiting forservice: " + self.serviceName)
  
          self.serviceNLU = ProxyServiceCaller({self.serviceName: RestaurantNLUService})
          # self.service = rospy.ServiceProxy(serviceName, ReceptionistNLUService)
  
      def execute(self, userdata):
  
          if self.serviceNLU.is_available(self.serviceName):
  
              try:
                  # Call the say service
                  srvRequest = RestaurantNLUServiceRequest()
                  srvRequest.str = userdata.sentence
                  response = self.serviceNLU.call(self.serviceName, srvRequest)
  
                  if not response:
                      userdata.answer = "unknown"
                      return "fail"
  
                  # Checking the validity of the response
                  if len(response.order) == 0:
                      userdata.answer = "unknown"
                      return "fail"
  
                  userdata.answer = response.response
                  return "understood"
  
              except rospy.ServiceException as exc:
                  Logger.logwarn("Restaurant NLU did not work: \n" + str(exc))
  
new_contents: #!/usr/bin/env python
  # encoding=utf8
  from __future__ import print_function
  from flexbe_core import EventState, Logger
  from flexbe_core.proxy import ProxyServiceCaller
  from flexbe_core import EventState, Logger
  import rospy
  from wm_nlu.srv import RestaurantNLUService, RestaurantNLUServiceRequest
  
  
  class SaraNLUrestaurant(EventState):
      '''
      Use wm_nlu to parse a sentence and return the answer.
      ># sentence         string      sentence to parse
      #> answer           string      answer
  
      <= understood       Finished job.
      <= not_understood   Finished job but no commands detected.
      <= fail     Finished job but sentence not successfully parsed or service unavailable.
      '''
  
      def __init__(self):
          # See example_state.py for basic explanations.
          super(SaraNLUrestaurant, self).__init__(outcomes=['understood', 'fail'], input_keys=['sentence'],
                                           output_keys=['answer'])
  
          self.serviceName = "/Restaurant_NLU_Service"
  
          Logger.loginfo("waiting forservice: " + self.serviceName)
  
          self.serviceNLU = ProxyServiceCaller({self.serviceName: RestaurantNLUService})
          # self.service = rospy.ServiceProxy(serviceName, ReceptionistNLUService)
  
      def execute(self, userdata):
  
          if self.serviceNLU.is_available(self.serviceName):
  
              try:
                  # Call the say service
                  srvRequest = RestaurantNLUServiceRequest()
                  srvRequest.str = userdata.sentence
                  response = self.serviceNLU.call(self.serviceName, srvRequest)
  
                  if not response:
                      userdata.answer = "unknown"
                      return "fail"
  
                  # Checking the validity of the response
                  if len(response.order) == 0:
                      userdata.answer = "unknown"
                      return "fail"
  
                  userdata.answer = response.response
                  return "understood"
  
              except rospy.ServiceException as exc:
                  Logger.logwarn("Restaurant NLU did not work: \n" + str(exc))
  
subject: fix typo