I have two questions about "You are welcome" in business chats.
When someone asks me to do something and I get back to them with some form of "done", they, in turn, respond with "Thank You. So far so good. At that moment am I obligated to post back "You're welcome"? Is it actually rude if I don't?
Second question about abbreviations. I often see "thx" or "TY" for "Thanks"/"Thank you". Is there an accepted abbreviated form of "You're welcome". I came up with "wcm" but not sure whether it's appropriate.
Additional clarification
- I'm fully aware of "sure" and "np" responses but my question is only about "welcome".
- I would like to respond "in kind" (if I have to respond at all). So for abbreviation I would like to respond with the same.