input: from typing import Dict, Any
  
  
  def virtual_assistant() -> None:
      """Create a virtual assistant using Python and Dialogflow to answer a basic set of questions. 
      The assistant will continuously prompt the user for input and respond until the user decides to stop.
      Example usage:
      >>> virtual_assistant()
      User: Who is the president of the United States?
      Assistant: As of my last update, Joe Biden is the president of the United States.
      User: What is the weather today?
      Assistant: I cannot provide real-time weather data. Please check a weather service for the latest information.
      """
      import dialogflow_v2 as dialogflow
      import requests
  
      project_id = 'project-id'
      session_client = dialogflow.SessionsClient()
      session = session_client.session_path(project_id, 'session-id')
  
      while True:
          text = input('User: ')
          text_input = dialogflow.types.TextInput(text=text, language_code='en-US')
          query_input = dialogflow.types.QueryInput(text=text_input)
          response = session_client.detect_intent(session=session, query_input=query_input)
  
          print('Assistant:', response.query_result.fulfillment_text)
output:         if text.lower() in ['exit', 'quit', 'stop']:
              print('Assistant: Goodbye!')
              break