Hi there, welcome to a wonderful forum 
Must admit I am not familiar with the King Parrot.
What is his name?
As Riley's mom mentioned some birds never talk, hopefully your's will not be the case.
Spend lots quality time with the bird, taking and talking and talking.
Perhaps to many words are being said to him.
Teaching a bird to many words to start with may confuse him.
Start with small words, hello and good boy.
Hopefully he will start talking.
If I was in your situation, I would stick to small words, until he says them.
As he's talking improves, add in more words.
Does he come out the cage on his own, and are you picking him up yet?
A bird must gain confidence and your trust.
If you are not handling him yet, sit near the cage, talking to him.
When he comes close to the bars, perhaps offer him a treat.
I taught me AG Mishka to KOPPIE KRAPPIE. (rubbing the top of her head) doing the following : She sat on my lap, I rubbed the top of my head, saying Koppie Krappie a few times. Then proceeded to try it on her head. At first she tried to bite me, rubbed my head again and again, It took a few days, eventually she let me.
These days, when sitting on my lap she says Mommy Koppie Krappie.
Koppie Krappie is an Afrikaans language here in South Africa, EVERYONE teaches this phase to there birds.
Good luck and keep us updated.
Take care