need help: B2 interview dates availability in chennai

[venkat.narsi]

hi all,
I know it's a silly question but it helps a lot.My in-laws got rejected(B2 visa) twice in hyderabad and after 6 months now i am sending them to chennai. Is it Ok if I send supporting documents through email(soft copies) or do i need to send hard copies.
And can any body tell me what are the dates open in chennai for next month

[venkat.narsi]

waiting for replies

Plz can anybody answer my QUestion