This is my first posting in this forum so please go easy on me!

Is it common for a Swiss operated flight to be changed to being operated by Helvetic at the last moment? LX1072 from Zurich to Frankfurt was showing as a Swiss operated CS100 and while in the lounge my boarding pass has been updated to show that it's now a Helvetic operated Fokker 100. I've had no communication from either Lufthansa with whom I booked the ticket or Swiss.

Is this common and do I have any rights in this situation as if I wanted to fly Helvetic I'd have chosen them!

Thanks!