I booked a jazz trio for a Client A at a hotel recently. Somebody working at the hotel then recommended me to Client B. In Client B's introductory email to me, they included quoted text from their conversation with the hotel, including the email in which I was recommended.
Is it appropriate for me to send a short "thank you for recommending me" email to the person working at the hotel?
Had Client B mentioned who at the hotel recommended me, I would instinctively think that it's plenty appropriate. However because I found the email by looking through the quoted text, I'm more hesitant.