How to align the result of Select

I'm working on a report, where I get the name of a person, and on what days it works. I was able to do this select, but I need the result to look like this:

[JOÃO - SEG/QUART]
[MARIA - TERÇ/QUINT]
[JOSÉ - SEG/TER/QUART]

I've used (xmlagg), but it's not working.

select DISTINCT 
    Substr(Obter_nome_medico(ag.CD_PESSOA_FISICA,'N'), 1, 100) nm_medico,
    rtrim(xmlagg(xmlelement(e,substr(obter_valor_dominio(35,at.ie_dia_semana),1,1000),';').extract('//text()')),';')
from TABELA1 a, TABELA2 ag, TABELA3 at
where Substr(Obter_nome_medico(ag.CD_PESSOA_FISICA, 'N'), 1, 100) is not null 
and a.cd_agenda = ag.CD_AGENDA 
and ag.cd_agenda = at.cd_agenda 
group by Substr(Obter_nome_medico(ag.CD_PESSOA_FISICA,'N'), 1, 100);