The reason why Indian service desk people are instructed to assume American names and locations is because of the sheer amount of abuse that's being heaped on them once the caller eventually discovers they're talking to an Indian person.

Not anyone is as nice as Izzy, sadly.

This is well known in India and there are even sitcoms on TV showing the daily work in such a call center -- skewering the abusive callers from the UK or the US. The scene in Slumdog is a cliché already part of Indian pop culture.

In the French speaking world, Morroco is the current favorite location for call centers, and here Mohamed and Leila are re-christened (pardon the pun), Pierre and Martine, for exactly the same reason. I've also heard of the Southern hemisphere -- Madagascar and Mauritius, but Romania makes sense too.