回應

https://www.uscis.gov/sites/default/files/document/brochures/M-1051-CS.pdf

(見 page 12)

• Returning the Notice:

  You'll need to return the official notice (Form N-445) to your local USCIS office. 

   
• Explanation Letter:

  Include a letter explaining why you can't attend the original ceremony and requesting a new date. 

   
• Legitimate Reasons:

  Common reasons for rescheduling include illness, medical or family emergencies, or other unforeseen circumstances. 

   

  不過，良心說，最好是能夠盡速回來，完成宣誓。(馬上買機票，兼程趕回，應該還來得及)