老公变公民后为我申请绿卡。等近两年移民局终于来面试通知。可由于万不得已的原因不能按移民局指定日期去面试。请问若改约面试时间会对本人申请有何影响？会往后推迟很久吗？移民局面试通知上写"Should you fail to appear for your scheduled interview or to request that your appointment be rescheduled, your application or petition will be deemed abandoned and all action thereon terminated, pursuant to current Service polic" - 挺吓人的。要是真得重新排队可怎么办啊！诚请经验人指教！