input: def create_virtual_assistant(project_id: str) -> None:
      """Create a virtual assistant using Python and Dialogflow to answer a basic set of questions.
      The assistant takes user input, interacts with Dialogflow, and then prints the response from Dialogflow.
      >>> create_virtual_assistant('project-id')
      User: What is the weather today?
      Assistant: Today's weather is sunny with a high of 75°F.
      """
      import dialogflow_v2 as dialogflow
      import requests
  
      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']:
          break