Just the beginning
Lex, who had been conversing with his guests, was extremely confused by the notification, but noting that it was not something urgent, set the matter aside for later. Currently, he was preoccupied with his guests. Seeing that the Innkeeper wasn't actually disappearing, and actually greeting his guests, many wanted to take an opportunity to get acquainted.
Lex knew for a fact that even with his enhanced mental capabilities, he would never be able to remember all the people he was meeting, but Mary's memory was reliable so that was his reliance on if he should ever meet them again.