I think the ATM will operate like the other ATM and I think that machine already had a converting currency from bitcoin into fiat, so we don't have to confuse how it works. The user will withdraw money in the fiat form, and it could be a local fiat form which they can use to buy something. Unfortunately, I don't have any experience for using that machine so I don't know exactly and maybe later if I can travel to the country which has a bitcoin ATM, I will try it.