Business Visa - B1

I had been for visa interview in Chennai on 08/28/2018

I was rejected, i had applied for attending my company's annual conference ( **** ** world)

My experience

VO : Good Morning
me : Good Morning

VO: your passport please
me : handed over the passport

VO: what is the purpose of ur visit
me: i am attending the company's annual conference

VO: where it is held
me: SFO

VO: for how many days your traveling
me: 2 weeks

VO: are u traveling alone?
me:yes

VO: are you going to present anything?
me : No

VO: what is ur role in the conference?
me: i will be attending & meeting my colleagues

VO: what is ur current profile?
me: Senior Network engineer

VO: whats ur job role?
me: handle network infrastructure

VO: network issues?
me: Yes

VO: how long you have been working in ur present comp?
me : 3 years

VO: whats ur current sal/annum?
me : 1* lakhs/annum

VO: have you visited any other country?
me: yes, Egypt, Maldives & Singapore

VO: are u married?
me: yes

VO: sorry at this point you are eligible for current immigration , handed me 214(B)
me : thank you

Really i dont know what went wrong.. i a planning to re apply again in 2 weeks.

any suggestions?

Regards,
Ani