This book gives phrases that might draw ISFJs out in the open...you know, like tapping two pieces of wood together for wild animals...
"I promise. You have my word on it."
"What would make you feel comfortable?"
"Do you need some time to think about this?"
"May I share something private with you?"
"What's your recollection about that?"
Yes, I'd say those phrases would attract ISFJs about as well as tapping two pieces of wood together would attract animals.