One of my favorite stories in Genesis is about Hagar and her son being forced out in the wilderness with only some water. She was Egyptian and had a son by Abraham and Sarah had cast her out. After drinking all the water, she was sure she and her son would perish, but Genesis 21:17 reads, “And God heard the voice of the lad; and the angel of God called to Hagar out of heaven, and said unto her, ‘What aileth thee, Hagar? fear not; for God hath heard the voice of the lad where he is.'”
That verse is not talking about a locality, but where we are mentally. God always hears our prayer and I find that so comforting. We needn’t worry about what words we are saying because He knows our heart. We can never be separated from God.