I'm sorry.

Sorry about that.

Please forgive me.

I didn't mean to.

It was my fault.

I apologize.

Excuse me.

I made a mistake.

I won't do it again.

I'm really sorry.

I forgot.

I was late.

I lost it.

I didn't know.

I was busy.

I was tired.

I was sick.

I had to work.

I had an emergency.

I missed the bus.

I didn't hear you.

I was in a hurry.

I was out.

I was on the phone.

I was in a meeting.

I was at school.

I was at work.

I was at home.

I was with my family.

I was with friends.

I was driving.

I was sleeping.

I was eating.

I was studying.

I was working.

I was shopping.

I was cooking.

I was cleaning.

I was exercising.

I was reading.

I was watching TV.

I was listening to music.

I was taking a shower.

I was walking.

I was out of town.

I was on vacation.

I was at the doctor.

I was at the store.

I sincerely apologize for the inconvenience.

Please accept my apologies for being late.

It was an honest mistake on my part.

I take full responsibility for what happened.

I assure you it won't happen again.

I'm sorry for any trouble I caused.

I didn't intend to upset you.

I hope you can forgive me.

I regret my actions.

I apologize for the misunderstanding.

I was delayed due to traffic.

I couldn't make it because I was unwell.

I had a family emergency.

I was caught up with work.

I lost track of time.

I was waiting for an important call.

I was helping someone in need.

I was stuck in a meeting.

I was dealing with a personal issue.

I was unable to find transportation.

I was preparing for an exam.

I was taking care of my child.

I was attending an event.

I was running errands.

I was feeling unwell.

I was waiting for someone.

I was handling an urgent matter.

I was on a business trip.

I was at an appointment.

I was in a different city.

I was at the hospital.

I was at the airport.

I was at the bank.

I was at the post office.

I was at the library.

I was at the park.

I was at the gym.

I was at the restaurant.

I was at the cinema.

I was at the station.

I was at the hotel.

I was at the conference.

I was at the workshop.

I was at the seminar.

I was at the exhibition.

I was at the concert.

I was at the match.

I was at the event.