Is there anyway to do this faster(Custom dialog gui) very slow?

I want to make a custom dialog (because the dialog of roblox is really bad) but it takes to long to make it (its a script in textlabel)

script.Parent.Text = "h"
wait(.1)
script.Parent.Text = "hi"
wait(.1)
script.Parent.Text = "hi T"
wait(.1)
script.Parent.Text = "hi Th"
wait(.1)
script.Parent.Text = "hi The"
wait(.1)
script.Parent.Text = "hi Ther"
wait(.1)
script.Parent.Text = "hi There"
wait(.1)
script.Parent.Text = "hi There :"
wait(.1)
script.Parent.Text = "hi There :D"

this way of changing the text of a textlabel takes to long is there anyway of doing this faster without just writing [script.Parent.Text = "hi There :D"]

You can use string.gmatch

String.gmatch finds a certain part of a string, and switches each time. In your case, your string is trying to find every letter, and add it on to the sentence. You could iterate through every letter with a for loop using string.gmatch, and then add that on to the sentence. Here's how I would do your code. (You would use the "." string pattern aswell.)

local sentence=("") -- empty string
s = "hi There :D" --your sentence
for w in string.gmatch(s, ".") do --for loop through every character
	wait(0.1)
   	sentence=(sentence.. w)-- add the character to the sentence
	script.Parent.Text=sentence--change the text
end

I hope this helps.