Hi @Sabrina2026
Thank you for your question.
If you buy a regular point to point ticket, it is valid the whole day on the selected journey, this means you can go to lunch in Bern and resume your journey later.
This is not possible with a saver or super saver ticket, because they are only valid on the specific connection that you choose. In this case you would have to buy two separate saver tickets: one from Geneva to Bern in the morning and one from Bern to Zürich Airport in the afternoon.
I wish you a nice day.
EleonoraS