"I apologize for any inconvenience caused."
"I apologize for my behavior yesterday."
"I apologize for not being able to make it on time."
"I apologize for any misunderstandings that may have occurred."
"I apologize for the delay in responding to your email."
"I apologize for any mistakes I may have made."
"I apologize for not being clear in my explanation."
"I apologize for the inconvenience, and we will do our best to rectify the situation as soon as possible."
"I apologize for any inconvenience this change may cause you."
"I apologize for not following up on the issue as promptly as I should have."