Thanks flyingfran !
Your report shows, how it usually goes, when I travel with my service dog. I rarely ever had problems, to find "seat companions", that want to sit with us, while a previously assigned passenger denies, to be with us. Only, it becomes critical, when flights are full and I travel just by myself. Had so many offers for further help after the flight - which I usually do not need, as someone meets me, or my husband is travelling with me.