If you’re using the quick commandline chat via keyboard key ’ V’ (or if you got it keybinded somehow, same story) > [ number ] [ number] in this case V > 2 > 1-2 which is the quick-chat request and number one means Medic! and number two Ammo!, so to my suggestion:
If you’re calling for v > 1 then an automatic mainchat message could appear like “Your current medic is ZaZa and is alive/dead” and same for v > 2, especially for new players this could be useful, both for yourself and your team, hopefully they have also went through the training session, and yes, obviously you can view directly from TAB and know who is who, but this could actually be helpful somehow.
And yeah, what if they don’t use the quick-chat, well, perhaps add some kind of filter which recognize/ detects the specific word and gives you an autoreply.
Yeah, ‘mainchat would be messy’, well, perhaps this could only show up to yourself, if you’re asking for a medic, the automsg ends up in your screen only.