He remained standing, but he inclined his head a little, in assent, and said, "I will listen, if that will help you."
Her head dropped, as if in assent and in greeting, but her hand bore down heavily upon her cane, for a moment, while she stood reliving their last encounter: the tortured hour of waiting, then the gently distant face at the desk and the tinkling of a glass-paneled door closing upon a stranger.
There are no more uses of "assent" in the book.
Show samples from other sources
She takes my silence as assent.
Sabaa Tahir -- An Ember in the Ashes
Their murmurs of assent and disapproval gave her a sense of order and rightness.