How to check what a person wrote in a textbox and give them an item named that?

I don't know if this is a proper answer but,

a =label.Text -- fix this

if a == item.Name then
-- place in inventory
elseif -- and so on

end

So here's what you can do:

local item = {} -- Put the item directory here.

local textButton = {} -- Put the directory of the TextButton.
local textBox = {} -- Put the directory of the TextBox.

local function giveItem(player)
    local findPlayer = game.Players:FindFirstChild(player)
    if findPlayer then
        if item then 
            local clonedItem = item:Clone()
            clonedItem.Parent = findPlayer.Backpack
        else
            print("No item has been detected.")
        end
    end
end

textButton.MouseButton1Click:Connect(function()
    giveItem(textBox.Text)
end

PS: This is the LocalScript version.

And when you're trying to set the name of the user and room on the card:

local cardInstance = {} -- Put the card directory here.

function giveCard(player)
    local clonedCardInstance = cardInstance:Clone()
    clonedCardInstance.Parent = player.Backpack
    local roomText = {} -- Put the directory that the Room Text on the card is on.
    local userText = {} -- Put the directory that the name of the Player text on the card is on.
    userText.Name = player.Name
end

PS: This is the server script version, add it to the card-giver script.