Your transfiguration clearly alarms the woman. She lets out a little yelp and raises her arms in front of her face, as to defend herself from you.

"Levitate..." But before she has time to finish her sentence, you flick your wand and cast the spell.

Leaving this horrible place is a good idea, if the person you try to save is cooperating. As it happens...

"What in the WORLD do you think you're doing?!" The older woman, surprisingly quick on her feet, now stands, glaring at you. "What kind of creature are you?!" Her voice, somewhat shaky from old age but also confusion and fear.

Wouldn't leaving be just grand? But you won't get far if you don't calm her down first. She's obviously shocked from her meeting with the dementor.

Somehow you must get her to cooperate. But what can help her calm down?