여행 1주일 남기고 세퍼에서 스케쥴이 변경됐다고 메일이 왔는데 한번 봐주세요~ ㅠㅠ

제목 그대로 세퍼에서 스케쥴이 변경됐다고 메일이 왔는데 메일 내용을 봐도 변경된 게 없고 세퍼 홈페이지 들어가서 리부킹 해봤는데도 변경사항이 없는데 왜 이런 메일이 온 걸까요??
메일 내용 좀 확인해주세요~
제 비행기 스케쥴은
인천-미날라: 7. 21.(일) 21:35 / 5j 189
마닐라-인천 : 7. 26.(금) 15:20 / 5j 188
며칠 전에 수화물을 추가햇는데 그래서 온건가 싶기도 하고.... 메일내용에서 비행기 스케쥴이 변경된 거는 없는 것 같은데 한번 봐주세요~ ㅠㅠ 이놈의 발영어가 문제.....

Dear ooo

Cebu Pacific would like to inform you that your flight has been cancelled due to aircraft situation. However, we have mounted another flight which you may take in lieu of the cancelled flight.

Your new flight details are as follows:
Name/s of guests:
ooo
ooo
oooBooking reference no.: S494SL
Flight details:
Flight No. 5J189 on July 21, 2013, departing Incheon International Airport at 9:35PM and arriving in Ninoy Aquino International Airport Terminal 3 at 0:25AM
Flight No. 5J188 on July 26, 2013, departing Ninoy Aquino International Airport Terminal 3 at 3:20PM and arriving in Incheon International Airport at 8:05PMWe sincerely apologize for any inconvenience this may have caused you.

Options available to the guests are as follows:

•Rebook without charges for travel within 30 days
•Refund or put in Travel Fund ticket value without penalties

Please click on the ACCEPT button below if above change is acceptable.

If you wish to change or cancel your booking, please call us at the following numbers:

Manila = (+632) 70-20-888
Cebu = (+6332) 230-8888
Hongkong = (+852) 39733800
Singapore = (+65) 31580808