"She was lucky we are here !"
"Don't say us thank you, we have only made our job !"
Small typical scenario on the subject
Peter (phone). "Please, come emergency here [...] It is an absolute disaster* and I can not handle this alone, it is X's fault that did nothing" [...]
Peter: "You are a looser, an absolute failure. O yes you have a gallery .. that you never open! it's a great succes indeed. I asked you to come? It was an error. Here you have served at nothing .. "
* In fact, it's not so awfull.
[Note, the characters can be reversed!]