Unfortunately, interact with the default voting system via script is not possible.
However, what you can do is emulate the voting system in a script usig the servercommand event
There are some old threads regarding this topic in the forum. and IIRC, Purple made a basic mapvote script (not sure if it was working)
if you search in the forum you will find them
I can't seem to find Purple's script, just people talking about this elusive script
Anyway, is there a way to capture a player's chat input via script? I have my own vote script outline mostly complete, however I do not want to rely on a user having to send their vote via the console and would prefer to use a 'key phrase' from chat. Asking a user to use the console is a no-go.
There isn't any chat event for Reborn yet.
There should be one in a future release though, given that Ryback arleady implemented it in NightFall (BT/SH patch)
You can make vote choice input limited. Bind f1 to a scmd that accepts the vote and bind f2 to a scmd the rejects the vote.
You can also entirely recreate reborns voting system in script, if you want more customization.