input: def virtual_assistant():
      """Create a virtual assistant using Python and Google's Dialogflow to answer a basic set of questions. The assistant will continuously prompt the user for input, process it using Dialogflow, and then display the response.
      >>> virtual_assistant()
      User: Hello
      Assistant: Hi there!
      User: How are you?
      Assistant: I'm just a computer program, but I'm here to help you!
      """
      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', 'bye']:
          print('Assistant: Goodbye!')
          break