This is more a WWYD
I work in a large organisation with several large departments which are distinct ; there are some "colleagues" in other departments that I know by name but wouldn't recognise on the street, but there are others with whom I interact weekly or even on a daily basis.
There is one colleague, C, with whom I have been working on a particular project for which she has set up a specific WhatsApp group, but otherwise each "department" has its own group.
I have also recently helped C out with a personal development project she was working on outside work (it was only an hour, but it was in my personal time.)
I have just received a WhatsApp message from C on the project group saying "I suggest Monday 1st July for the tapas evening: I propose to bring homemade sangria.
I have not heard mention of a tapas evening before, but the use of "the" suggests to me that it has been discussed between a particuar group and they are trying to fix a date. I really think C meant to send it to her departmental group: a tapas evening is the kind of thing her department would organise, but having only arrived in the company just before Christmas I have no idea if last year all the departments had a joint "pre summer holiday" event, (tapas or something else) or if each department organises their own event.
So should I pretend I haven't seen it and let C realise her mistake? I am the only member of the project group who is not also a member of C's main departmental group.
Should I reply : "I don't think this was meant for me."
Should I reply "Yes, lovely, I'll bring homemade pizza."
Other suggestions?