1
You will have to pay the application fee
2
Then you will have to fill up the Nonimmigrant Visa Electronic Application that is DS-160 form.
3
You will have to pick an appointment date online. You will see a message onscreen showing available appointment dates including emergency appointments.
4
You will have fill an Emergency Request Form and give an authentic reason for applying for the same.
5
You will have fill an Emergency Request Form and give an authentic reason for applying for the same.
6
You will get an email from the US Embassy if your request has been approved.