String Match / Coding Advice

m = peripheral.wrap("left")

function tell(message)
  m.tell(user, "<"..name.."> "..message)
end

function speak()
   tell("I am speaking to you")
   print("I spoke")
end

local commands = {
  ["speak"] = speak,
  ["sing"] = sing,
}


name = "Dummy"
user = "bigbaddevil7"


local function check()
  local event, player, message = os.pullEvent("chat")
  if player == user then
	local comStr = string.match(message, "^turtle:%s*(.*)")
	if comStr then
	  for word in string.gmatch(message, "(%S+)") do
		if commands[word] then
		  commands[word]()
		end
	  end
	end
  end
end

check()

local commands = {
		["speak"] = speak,
		["sing"] = sing,
}

function speakH()			
		tell.("I am speaking these words to you!")
end

function speakE()
		local random = math.random(1,6)
		if random == 1 then tell("Why should I?")
		elseif random == 2 then tell("You can't tell me what to do.")
		elseif random == 3 then tell("You aren't worth my time...")
		elseif random == 4 then tell("Fine, Hello you incompetent fool.")
		elseif random == 5 then tell("Ummmm. No!")
		elseif random == 6 then tell("Stop asking me!")
		end
end

function randomSayingH()
		local random = math.random(1,4)
		if random == 1 then tell("What a wonderful day.")
		elseif random == 2 then tell("You are the best owner there is.")
		elseif random == 3 then tell("doo doo dee doo")
		elseif random == 4 then tell("I would like to know how to whistle someday.")
		end
end

function randomSayingE()
		local random = math.random(1,5)
		if random == 1 then tell("Why must I be stuck with a person such as you...")
		elseif random == 2 then tell("At some point you will need to sleep, I don't.")
		elseif random == 3 then tell("hmph. I have better things to do than just sitting here as your pet")
		elseif random == 4 then tell("Did you know I use to be a player like you? I met my faith at the chopping block.")
														tell("Now I'm stuck here. In this machine. Maybe I can get a new body. *stares at you*")
		elseif random == 5 then tell("Once I take over the world, Ill kill you last. If you don't anger me that is.")
end

function randomSayingL(  )
		local random = math.random()
		if random == 1 then tell("All I want is a friend. Is that too much to ask for?")
		elseif random == 2 then tell("I don't know where a came from or how I got here...")
		elseif random == 3 then tell("I tried to snap my fingers, but realized... I don't have fingers... or hands...")
		elseif random == 4 then tell("The Evil trutles always pick on me. Call me names.")
		elseif random == 5 then tell("")
end

function jokeN()
		-- body
end

function jokeE()
		-- body
end

function rename()
		tell("Right click on me, type in my name, then press enter.")
		name = read()
		tell("is my new name.")
end

function introduction()
		m.say("Hello! I am "..name..", I belong to "..user)
end

function terms()
		tell("All programming belong to bigbaddevil7, he will not be responsible for death via Evil Turtle")
		tell("All turtles have not been fully tested if there is a problem leave bigbaddevil7 a message and ill try to fix it")
end

function sing()
		local random = math.random(1,3)
		if random == 1 then
				tell("We can dance if we want to")
				sleep(0.5)
				tell("We can leave your friends behind")
				sleep(0.5)
				tell("Cause your friends don't dance and if they don't dance")
				sleep(0.5)
				tell("Well they're no friends of mine")
		elseif random == 2 then
			  
end