Most of us would have given up, but not the woman in Matthew 15:25-28 who was looking to Jesus to heal her daughter.

First Jesus ignored her.
Then He tells his disciples, I'm not sent to help her.
Then He tells her, It's not right to take the children's bread and give it to dogs. Jesus called her a dog.
She continued to worship Him and ask.
She told Jesus, Truth, Lord: yet the dogs eat of the crumbs which fall from their masters' table.
Jesus had taken this woman to the limits and she passed.
Her faith turned His power loose and her daughter was healed.