Thanks all for replies.
No, I have not done an Indian engagement before nor any engagements nor any weddings nada. Zilch.
I told the guy "do NOT count on me for images, hire a pro photographer" I am just there to try it out and if something decent will come out, he can have the high res images free of charge of course.
Do not have a contract, other than verbal (if any images are decent, I'll post them to my online portfolio).
As far as props go, do not have any and can't afford any either. I am borrowing 5d camera with several L lenses and 1 flash with soft box. It may not be enough and probably isn't going to be good, I am mostly counting on natural light (hope it won't rain).
Yeah, I searched on Internet for an Indian engagement photos found some great shots so at least I know what to expect and what to see. Atm I am a nervous wreck and terrified just hope I'll take good photos (better than their pro photographer). There are some photographers in my city who take horrible pictures and manage to stay in business.
Here is an example