code: def reply(self, ticket_id, text='', cc='', bcc='', content_type='text/plain', files=[]):
          
          return self.__correspond(ticket_id, text, 'correspond', cc, bcc, content_type, files)
docs: Sends email message to the contacts in ``Requestors`` field of
          given ticket with subject as is set in ``Subject`` field.
  
          Form of message according to documentation::
  
              id: <ticket-id>
              Action: correspond
              Text: the text comment
                    second line starts with the same indentation as first
              Cc: <...>
              Bcc: <...>
              TimeWorked: <...>
              Attachment: an attachment filename/path
  
          :param ticket_id: ID of ticket to which message belongs
          :keyword text: Content of email message
          :keyword content_type: Content type of email message, default to text/plain
          :keyword cc: Carbon copy just for this reply
          :keyword bcc: Blind carbon copy just for this reply
          :keyword files: Files to attach as multipart/form-data
                          List of 2/3 tuples: (filename, file-like object, [content type])
          :returns: ``True``
                        Operation was successful
                    ``False``
                        Sending failed (status code != 200)
          :raises BadRequest: When ticket does not exist