input: Write a function to create a virtual assistant using Python and Dialogflow to answer a basic set of questions. The function should take user input, process it using Dialogflow, and print the assistant's response.
  import dialogflow_v2 as dialogflow
  import requests
  
  def virtual_assistant(project_id, session_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)
  
  assert virtual_assistant('project-id', 'session-id')
  assert virtual_assistant('another-project-id', 'another-session-id')
  assert virtual_assistant('project-id-3', 'session-id-3')
  assert virtual_assistant('project-id-4', 'session-id-4')
  assert virtual_assistant('project-id-5', 'session-id-5')
output: 
  def virtual_assistant(project_id, session_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)
  