My apologies for the late reply and thank you so much for asking me that again. I¡¯ve been busy because of tests. If it is not too late OOO would love to attend OOO's b-day party. Thank you again.
(planning to go to trip ¸¸ °íÄ¡¸é¿ä.- -> planning to go on a trip/planning a trip/planning to take a trip) ±×¸®°í I was busy with my tests... ±×³É tests°¡ ¾Æ´Ï¶ó my tests ·Î ÇϽÅÇ¥Çö ÀßÇϼ̾î¿ä.