From what I understand the corpus callosum connects input to memory. If it is damaged, it can make storing memory difficult. Visual and auditory sensation/input needs to be directed to memory banks.

You may find that you can remember things better if you repeat things out loud before moving on. This adds multi-sensory avenues for remembering.

The CC also is a big part of the filtering of sensory input. I would expect you struggling with too much sensory stimulation. As my neuro said, I hear everything. Nothing gets filtered out.

When you lose track of thought a conversation, it's likely that your processing is distracted. Sort of a lack of focus. Too many voices can be brutal in this situation.

Smart phones and tablets can be very helpful in these situations for making notes and reminders.