How would I make a player teleport by saying something in chat?

game.Players.PlayerAdded:Connect(function(player) 
	player.Chatted:Connect(function(msg) 
		if msg == "Yessir" then
			game:GetService('TeleportService'):Teleport(GameID) 
		end
	end)
end)

player.Chatted is a function that detects when the player writes something into chat and msg is a parameter which is what the player typed into the chat.

You can use TeleportService to teleport players to different servers and games

local TeleportService = game:GetService("TeleportService")
TeleportService:Teleport(gameid)