One Indian Girl by Chetan Bhagat

One Indian Girl is the story of Radhika Mehta, a worker at the Distressed Debt group of Goldman Sachs, the investment bank.
The book begins with Radhika making arrangements regarding her marriage with Brijesh Gulati who works in the Facebook company in San Francisco. 
But later during the wedding, both her ex -boyfriends show up and ask her to flee with them.