What is another way to say you are so welcome?

Could you possibly enlighten me on an alternative phrase that conveys the same sentiment as 'you are so welcome'? I'm intrigued to know if there are other expressions in the English language that effectively communicate the idea of gracious acceptance and heartfelt appreciation in response to a kind gesture or expression of gratitude. It would be fascinating to explore the nuances of these phrases and understand how they might differ in tone or connotation from the traditional 'you are so welcome'.