As an alternative to Skype, you could use "vLine link": https://vline.com https://vline.com. The advantage over Skype with this use case is that you don't need

As an alternative to Skype, you could use "vLine link": https://vline.com https://vline.com. The advantage over Skype with this use case is that you don't need to add them as a contact (especially if it turns out to be someone you decide you don't want to stay in contact with). Disclaimer: I work for vLine.