帮忙翻译一句话，中译英，谢谢~！

因为我周六需要参加二场考试，在此期间我的手机可能被要求关机。
Since I have two exams this Saturday, in this period my cell phone will be power off
为了不耽误如你有订机票的需要，特将时间告之。谢谢
To avoid any delay of your requirement of fight ticket booking, please pay attention to the power off time period below.Thanks
4月18日上午8：30~11：00
8：30~11：00 am 18th Apr
4月18日下午14：00~16:00
14：00~16:00 pm 18th Apr

Because I have to take two exams on Saturday, my cell phone might be turn off under the rules.
In consideration of your need of booking airline tickets, here I tell you the scheduel of my exams. Thanks.
April 18th, 8:30-11:00AM
April 18th, 2:00-4:00PM

Because I need to attend two examinations on Saturday, being request in my cellular phone possibility of this period to shut down.

To not hold up if you have already booked the demand of the ticket, especially telling time it.Thanks
Morning of April 188:30~11:00

The afternoon of April 1814:00~16:00