Randomly accessing dictionary string values in a .plist file

I have created a simple dictionary:

    let quotes: NSArray = ["hello", "ola", "hi"]

Then I randomly access the strings in this dictionary with the following code:

    let range: UInt32 = UInt32(quotes.count)
    let randomNumber = Int(arc4random_uniform(range))
    let QuoteString = quotes.objectAtIndex(randomNumber)
    self.resultLabel.text = QuoteString as? String

Since I would ultimately like aloft of items in my dictionary, I should create a .plist file and called it "Quotes.plist" - it will be easier to manage a dictionary of many strings.

How can I write a simple code so as to randomly access strings within my .plist?