God is not a god of no's. He has everything and owns everything and it is his good pleasure to give you the kingdom.....
I feel that the only way you will get no answer (or get the optimistic "no") is if you are not asking correctly (Have not asked God to teach you how to pray)
It's not about the words, it's about what is "in the heart at the time", or what is "upon the heart at the time", and if your heart is "right alignment with God's will"... But, it's not about the words, or even posture or anything, not really...
If we yet children and owned the world.....what could they ask for that we would not give? Even if we feel they shouldnt have it now....what would make you ignore the request outright?
You don't give the keys to the car to a young child, and you don't allow a toddler to cook whole means for the family on the stove and using the oven, ect, ect...
Those "no's" will eventually become yes's, but not yet...
Some things were just not ready for till were ready for them... for all kinds of very good reasons that, at the time, we do not fully understand or comprehend yet, until later on, or when, or till, or until, or after were ready and have it...
We should however, keep on asking, and keep on knocking, and keep on praying, but, BUT, "as we grow and mature and develop", cause with that, a "no" can become a "yes" sometimes, or in time...
God Bless!
Also, and for example, sometimes were not fully aware in "what's (else is) involved" with our requests, and I'm sure there are very many other very good reasons also, and I do not claim to be aware of all of them...
But God most certainly is... We have to trust that...
God Bless!