How to get a door that opens with one word?

I'm planning to make an office area with a unique door that opens when you say something, but I don't know how I can do that. May someone help me with this?

The Player.Chatted event has the message argument that gets passed to a function to interpret what a player says as a string literal.

game.Players.PlayerAdded:connect(function(player)
	player.Chatted:connect(function(msg)
		if msg=="something"then
			OpenDoor()
		end
	end)
end)

First, you define the path of the brick, using a variable is the best.

local brick = (BRICK PATH HERE) -- Change (BRICK PATH HERE) to where the brick is.

Then, you listen to event chatted, but first you need to define the player also.

local brick = (BRICK PATH HERE)
game.Players.PlayerAdded:connect(function(player) -- Defining player/Listening to join to get player.
	player.Chatted:connect(function(msg) -- Listening to their chat. Variable "msg" is the player's chat.
	end)
end)

Then finally, read the message and make changes to the brick so they can move.

local brick = (BRICK PATH HERE)
game.Players.PlayerAdded:connect(function(player)
	player.Chatted:connect(function(msg)
		if msg == "string" then -- If the message is "string" then do...
			brick.CanCollide = false -- Allow player to move through block.
			wait(3) -- Wait 3 seconds...
			brick.CanCollide = true -- Disallow player to move through block.
		end
	end)
end)

If you want, you can add privileges.

local Privileged = {"Deltrac", "randomguy"} -- In Privileged, there is Deltrac and Randomguy.
local brick = (BRICK PATH HERE)
game.Players.PlayerAdded:connect(function(player)
	player.Chatted:connect(function(msg)
		if player.Name == Privileged then -- If player's name is in table Privileged
			if msg == "string" then
				brick.CanCollide = false
				wait(3)
				brick.CanCollide = true
			end
		end
	end)
end)