def _build_message(input_table, output_table, current_date):
  """Returns a JSON object containing the values of the input parameters.

  Args:
    input_table: A string containing the BQ table to read from
    output_table: A string containing the BQ table to write to
    current_date: The processing date to suffix the table names

  Returns:
    JSON oject containing the input data
  """
  msg = {
      'bq_input_to_predict_table': input_table,
      'bq_output_table': output_table,
      'date': current_date
  }

  return msg