Now my momma told me if you had nothing nice to say, don't say anything at all. Most times, I live by this. I think my husband gets the brunt of when I can't manage to bite my tongue. The rest of the time, I do a lot of teeth clenching!
However, Chief has given me liberty to share what I meant to say. Play along. It'll be cathartic.
What I said: Thanks. Have a nice day.
What I meant to say: Um, Miss Librarian lady? Can you be any more of a grump? I mean, seriously! Cheer up already. Do you get yelled at a lot from irate patrons who can't find the book they want? Is it all that shelving that is making you exceptionally disgruntled??? And it's not just today. It's every time I come in here. I will go to other librarians just so I don't have to interact with you. Good grief!
(But I don't say these things. Because maybe she is suffering from something at home that I don't know about. However, at this one particular library I visit, disclaimer: not in my town, I would say that half of the librarians act like I am putting them out by checking out books. Uh oh, I feel a whole post coming on.)