Both are correct

If you say "Hinahabol NG balbón na aso ang bola." that means " The hairy of dog is chasing the ball" Yes, true "ay" is always marked by "ang"

It should be " Sana tatawagin mo siya" hmmm there is other way to express " I hope" is "Hiniling" You can also say "Tatawagin mo siya sana" When you try to express "hiniling" It must have pronouns on it after "hiniling" for example, "Hiniling ko sana manalo ako sa lotto" "I wish i will win in lottery" In fact, it has to come "before" the word "hiniling + personal pronoun(I,you,we,he,she,etc.) "We hope to meet you soon" is "Sana magkita tayo muli" or "Hiniling ko magkita tayo muli" actually, you can add "sana" after "hiniling ko" "You hope to get a good spot at the show tomorrow" is "Hiniling mo na makukuha mo ng magandang pwesto sa palabas bukas." "He hopes that I will wait for you". "Hiniling niya na maghihintay ako sa iyo."