Zoroastrianism was the official religion of Persia, its birthplace, for more than a millennium, but today the community is a fraction of its former size, and that's raising serious concerns about the future of the faith.
Ms Havewala is a Zoroastrian — or 'Parsi' (meaning 'Persian') as they're known in India — a member of an ancient monotheistic faith that pre-dates Islam and Christianity.
Zarin Havewala doesn't call herself a professional matchmaker, but her track record suggests otherwise.
Unofficially, she manages an international database of Zoroastrian bachelors and bachelorettes — an extensive list of names and numbers, careers and qualifications, ages and email addresses — that's shared with singles who are looking for love.
What is Zoroastrianism?