"You have claimed to be the girl's father."
"Well?"
"You are not her father."
"How do you know?"
"I know."
"It is to my interest to find the girl, and it is to your interest to aid me. I will admit to you that I have not disclosed who or what I am."
"You must, if you desire my aid."
"I can pay you for your service. Listen! you claim to be a friend of the girl; so am I her friend."
"You know something concerning her real identity?"
"I do."