input: from typing import Dict, Any
  
  def generate_speech(request_data: Dict[str, Any]) -> Dict[str, str]:
      """This function processes a JSON payload from a POST request and generates a response for a voice assistant. 
      It extracts necessary parameters from the request, determines the appropriate action based on the request's action field,
      and constructs a JSON response containing a 'speech' field with the text to be spoken by the voice assistant.
  
      >>> request_data = {
      ...     "result": {
      ...         "action": "productos.sura",
      ...         "parameters": {"tipo_cliente": "particular"}
      ...     }
      ... }
      >>> generate_speech(request_data)
      {'speech': 'Buscando productos para particular', 'displayText': 'Buscando productos para particular', 'source': 'apiai-onlinestore-shipping'}
      
      >>> request_data = {
      ...     "result": {
      ...         "action": "producto.info",
      ...         "parameters": {"producto": "hogar"}
      ...     }
      ... }
      >>> generate_speech(request_data)  # Note: Output depends on the content fetched from the URL
      {'speech': '<HTML content from fetched URL>', 'displayText': '<HTML content from fetched URL>', 'source': 'apiai-onlinestore-shipping'}
      """
      result = request_data.get("result")
      parameters = result.get("parameters")
      speech = ""
  
      if result.get("action") == "productos.sura":
          cliente = parameters.get("tipo_cliente")
          speech = "Buscando productos para " + cliente
          
      elif result.get("action") == "producto.info":
          producto = parameters.get("producto")
          if producto == "hogar":
              url = "https://www.sura.com/soluciones-personas/seguro-hogar.aspx"
              r = urllib2.urlopen(url).read()
              soup = BeautifulSoup(r, 'html.parser')
              contenido = soup.find_all("div", class_="textRightColumn")
              if len(contenido) == 0:
                  speech = "No encontrado"
              else:
                  speech = contenido[0].get_text()
          else:
              speech = "Buscando informacion del producto " + producto
              
      elif result.get("action") == "planes.salud":
          url = "https://api.segurossura.com.co/public/v1/directory/products"
          myResponse = requests.get(url)
          if myResponse.ok:
              jData = json.loads(myResponse.text)
              speech = "Seguros Sura Colombia ofrece los siguientes planes de salud: \n"
              for plan in jData:
                  speech += "\n" + plan["nombreField"].title()
                  
      elif result.get("action") == "info.especialistas":
          producto = parameters.get("plan-salud")
          ciudad = parameters.get("ciudad")
          especialidad = parameters.get("especialidad")
          url = "https://api.segurossura.com.co/public/v1/directory/search/" + producto + "/" + ciudad + "?speciality=" + especialidad + "&firstname=&secondname=&firstlastname=&secondlastname="
          myResponse = requests.get(url)
          if myResponse.ok:
              jData = json.loads(myResponse.text)
              speech = "Los profesionales que coinciden con tu busqueda son: \n"
              for medico in jData:
                  speech += "\n" + medico["nombreField"] + "\n Direccion: " + medico["direccionField"].title() + "\n Telefono: " + medico["telefonoField"] + "\n"
                  
      elif result.get("action") == "coberturas.producto":
          producto = parameters.get("productos")
          speech = "Buscando coberturas del producto: " + producto
      else:
          speech = " "
  
      return {
          "speech": speech,
          "displayText": speech,
          "source": "apiai-onlinestore-shipping"
      }
output:     import urllib2
      from bs4 import BeautifulSoup
      import requests
      import json