How’s something like this:
"Hi Kurt, nice to meet you. I was on DiveBuddy.com recently and heard wonderful things about your establishment. I met a very nice person named Sandy Koster. Sandy was very friendly, very informative, and very enthusiastic about diving. She made me feel like an old friend and made me feel very welcome to visit Blue Grotto. I decided to reschedule my driving plans on the way to DEMA so I could be sure to get a dive in here. Tell Sandy I said Hello and Thank You!"