Bind for Hi with custom text.
/bind h vsay Hi Hello there guys!
Bind for Need a medic! with custom text.
/bind h vsay medic I'm not quite dead!
Script for multiple messages on the same key.
set medic0 "vsay medic I'm not quite dead!; set medic vstr medic1"
set medic1 "vsay medic I'm getting better!; set medic vstr medic0"
set medic "vstr medic0"
bind h "vstr medic"