It's oddly informal to call anyone besides a family member—or a servant—by their Christian name. On the other hand, it might be easier than deciphering a strange foreign name. Mr. Hamato? Mr. Michaelangelo? Wait...
"I believe I met a friend of yours on my first visit to Milliways, Lady Thayet. She spoke kindly of you.
"It is my pleasure to finally make your acquaintance, Mike."
Re: Lounging
"I believe I met a friend of yours on my first visit to Milliways, Lady Thayet. She spoke kindly of you.
"It is my pleasure to finally make your acquaintance, Mike."