I was surprised when the woman said it to me. Thus it sort of sealed for me that such a phrase was simply a large part of the last chapter What To Say At The End -in the book Things For A Therapist To Say.

The second one said that at the end the client says "thank you for working with me" and the therapist says "It has been my privilege to work with you"
I think my mouth dropped open. Of course, I did not say it and neither did she. Instead I asked "What the hell was actually supposed to happen here" and she said "It depends"