Us visa -chennai

[sandhyaravichander]

Hi everybody
My cousin in Us wants to take me and there parents to us.
to avoid cancellation we had selected 2 appointments one for my aunt and uncle and the second for me.

we got the appoinment on 2aug
we trying for more than a week we could modify the dates
we want appointment in April or first week of may

we r following all the process for modification some times we find availability but when clicking on it it is not working it says Slots over-embessy people is telling due to different type of visa

can any one help us
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