Were you paying attention?
Not all career conversations are directly about you and getting ahead. Getting personal feedback is great, but it is only one aspect of career conversations. Career Conversations come from many sources, not just bosses and mentors. They may be hiding in meetings and other conversations.
If you just had a hallway conversation about someone leaving or moving to another position, THAT was a Career Conversation. Note where they went and what gap that leaves. If the role is already back-filled, note what skills and expertise was selected. Another Career Conversation could be your follow-up with the perspn who moved.
Did you just leave a meeting about a persistent problem your department or a customer is facing? Add that to your journal of career impact information. Do you see a trend developing? Do you see a skill that you can offer (or that you need to acquire) to be part of the solution? And THAT was a Career Conversation, too.
We need many different sources and views to continuously manage our careers. In addition to the daily and on-going work we do, we need to pay attention to the business of the organization and the public served via budgets, customer needs, regulations and issues such as hacking, climate and demographics that effect how and where we work.
These make for fascinating and on-going Career Conversations. You can discover new tracks and ways to do what matters most.