To me it always sounds like they are desperate for busine$$, nothing more. I understand but... I just answer a polite and short, "I'll let you know". They get the message. Now it's a completely different story with a regular whom I have an ongoing rapport with. They too I tell them "I'll let you know when I'm in town again ASAP" but we've had a connection going and I see it as good customer service for him to like repeats and regulars. Those are the ones I bring little gifts for, and take out to eat and more, so it's different. And yes I don't fool myself thinking it's anything more than business, but pleasant for both sides makes it even nicer.
I once had one message me and ask the next day "if I STILL wanted to meet up with him"! We had not only met, but I called him per his request after exchanging messages and telling him I wanted to meet him when I came into town later that week. Called him again once I arrived to tell him my room number and hotel, met in my room for a session and he wasn't able to connect I was the same person after all that. He either had LOTS of business or he wasn't too bright. I just guessed it was all his roids! 😆