def delete_utterances(botName=None, userId=None):
    """
    Deletes stored utterances.
    Amazon Lex stores the utterances that users send to your bot unless the childDirected field in the bot is set to true . Utterances are stored for 15 days for use with the operation, and then stored indefinately for use in improving the ability of your bot to respond to user input.
    Use the DeleteStoredUtterances operation to manually delete stored utterances for a specific user.
    This operation requires permissions for the lex:DeleteUtterances action.
    See also: AWS API Documentation
    
    
    :example: response = client.delete_utterances(
        botName='string',
        userId='string'
    )
    
    
    :type botName: string
    :param botName: [REQUIRED]
            The name of the bot that stored the utterances.
            

    :type userId: string
    :param userId: [REQUIRED]
            The unique identifier for the user that made the utterances. This is the user ID that was sent in the or operation request that contained the utterance.
            

    """
    pass
