H1B, H4 Visa

I attented my H1 i/v on dec 1 in chennai consulate.
My appt time was 4:45-5:00pm but I reached consulate 4:05.
they let me in immediately, I was surprised to see not any rush.
at most two ppl were there at every counter..I have came out within 1/2 an hr..

Here is how my i/v went...

VO: How are you doing..?
Me: I am fine. (gave my papers to him)
VO: Can I see your graduation..?
Me: Sure (I gave my graduation certificate..)
VO: (Looked at it for few secs and returned back...) What are you going to work at united states..
Me: I will be working for YYYY company. I will be put up in YYY project. Project is done for ZZZ client (here i guess i made a mistake.. i might not have mentioned about client, anyway thats mentioned in my employers letter)
VO: (he said client name again) ZZZ...?
Me: yes..
VO: Do you have a letter from ZZZ client stating that this project exist..?
Me: I dont have letter from ZZZ, but have a letter from my employer ZZZ..
VO: Are you going to work for ZZZ or ZZZ.?
Me: I am going to work for YYYY only..he is going to pay me..only the project I do is for ZZZ client..
VO: I understand that...
Me: (I was trying take out my company profile from my file)
VO: No..I dont need that...
VO: (updating application status on his system and took a blue 221g from and wrote get a letter from ZZZ... ) I am not convinced that you have job waiting for you there..(I tried to say something..but he said first listen to what I am saying and continued) basicaly I need a letter from your client that this project exists and complete itinerary of your trip. you can come again for i/v as per instructions in the form...
Me: Thanks..(returned)

So be careful..If you are saying about client..be sure that you have a letter from client..