SQL*Plus spool only data and exclude errors

Question

I'm using .Bat file to execute an sql script, similar to this one

SET HEAD OFF
SET ECHO OFF
WHENEVER SQLERROR EXIT 1;

SPOOL D:\oracle\results.TXT

SELECT name FROM employee where employee_number = 123;

SPOOL OFF;
EXIT;

if the query runs I'll get the results without a problem, but if the database is down or something cause an oracle Error happens, I'll get an error in the text file ( which I don't want to), my question is:

• Is there a way to spool the data if only the query runs without errors and to exclude if there is an error? or at least if there is an error.
• Can I write a certain text in the results.txt file instead of oracle error?