Ford Sync Emergency Assistant and Phone Book broken

Hello Ford driving, for a few days now my car, after switching on the ignition, tells me that the emergency assistant is not available and therefore I should contact my dealer for inspection. Besides, he suddenly no longer knows the contacts called by voice input and claims that an XY is not available in the phone book (or something similar). Of course I will contact my friend, but if someone in advance a helpful (because perhaps cost-saving ende) idea has, would he be sure of my deep gratitude. Can one reset the system somehow?