input: 
  def run_virtual_assistant():
      """
      Creates a virtual assistant using Python and Dialogflow to answer a basic set of questions.
      The assistant continuously prompts the user for input, processes the input using Dialogflow,
      and then outputs the assistant's response.
      
      >>> run_virtual_assistant()
      User: What is the capital of France?
      Assistant: Paris
      User: Who wrote Hamlet?
      Assistant: Hamlet is one of William Shakespeare's most famous plays.
      """
      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:     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)