If you mean a number system, just do this:
npc2133 gives choices for “*Say what you want here*”
in case “1”
npc2133 says “*Put an action you want here*”
in case “2”
npc2133 says “*Put an action you want here*”
in case “3”
npc2133 says “*Put an action you want here*”
in case “4”
npc2133 says “*Put an action you want here*”
in case “5”
npc2133 says “*Put an action you want here*”
in case “6”
npc2133 says “*Put an action you want here*”
in case “7”
npc2133 says “*Put an action you want here*”
in case “8”
npc2133 says “*Put an action you want here*”
in case “9”
npc2133 says “*Put an action you want here*”
in case “0”
npc2133 says “*Put an action you want here*”