input: from typing import List
  
  
  def detect_intent(text: str, project_id: str, session_id: str, language_code: str = 'en-US') -> str:
      """Detects the intent of a user's query using Dialogflow and returns the assistant's response.
      
      >>> detect_intent('Hello', 'project-id', 'session-id')
      'Assistant: [response from Dialogflow]'
      >>> detect_intent('How are you?', 'project-id', 'session-id')
      'Assistant: [response from Dialogflow]'
      """
      import dialogflow_v2 as dialogflow
      
      session_client = dialogflow.SessionsClient()
      session = session_client.session_path(project_id, session_id)
      
      text_input = dialogflow.types.TextInput(text=text, language_code=language_code)
      query_input = dialogflow.types.QueryInput(text=text_input)
      response = session_client.detect_intent(session=session, query_input=query_input)
      
      return f'Assistant: {response.query_result.fulfillment_text}'
output:     import dialogflow_v2 as dialogflow
      
      session_client = dialogflow.SessionsClient()
      session = session_client.session_path(project_id, session_id)
      
      text_input = dialogflow.types.TextInput(text=text, language_code=language_code)
      query_input = dialogflow.types.QueryInput(text=text_input)
      response = session_client.detect_intent(session=session, query_input=query_input)
      
      return f'Assistant: {response.query_result.fulfillment_text}'