parents missed their IR5 visa interview appointment due to unavoidable situation. got reply from supportusatraveldocs that you can reschedule interview date on your own, when i go to reschedule i choose immigrant visa category and IR5- it tells me to choose OFC appointment . we have already done the VAC figerprint appointment . i dont think i need OFC (drop box ) appointment . do i need to choose "Embassy interview " option and then choose LPR lawful permanent resident catergoery to fix appointment wiht emabssy in mumbai?