There was none. I was called by a foreign phone number, so I didn't immediately answer. However, when I saw that I had also received an email from the person who wanted to speak to me asking to set up a time I responded, probably five minutes after they called to say that I was available to be called at any time and I apologised. I even called back the number to leave a message, nothing, no response weeks later. Why bother even contacting me and asking to set up a time at all?