Dear {Recipient},

I'm sorry I couldn't attend {event} {yesterday/the other day}. I had been looking forward to it ever since I received the invitation, but unfortunately, I wasn't able to go because of {reason}.

I'd also like to apologize for not {calling/texting} you, but I didn't want to bother you. I know how stressful it can be to {host/organize} a {type of event}. I heard it was a success though, so congratulations!

I hope to catch up with you soon. Do let me know when you're free.

Sincerely,
{Your Name}

Dear {Recipient},

Please accept my apologies for not attending your party {last night/yesterday/etc.}. I wanted nothing more than to celebrate {occasion} with you; sadly, {reason} hence I couldn't make it.

I would have {called/texted}, but I knew you were busy with {host/hostess} duties and I didn't want to bother you. I'm sure all your guests had a wonderful time. I'm a little jealous, actually.

Anyway, {I wish you a happy birthday/congratulations on your well-deserved success/etc.}! Let's meet up soon, shall we?

Warmly,
{Your Name}

Dear {Recipient},

Please accept my apologies for not showing up at {event} {yesterday/last weekend/etc.} despite RSVPing “yes.” I was really looking forward to the event; sadly, I wasn't able to attend at the last minute due to {reason for absence}.

I'm really sorry I couldn't be there to celebrate {occasion} with you. I didn't {call/text} you anymore because I didn't want to bother you on your big day. Anyway, I wish you {a happy birthday/all the best/etc.} and I hope we can catch up soon!

Warmly,
{Your Name}

Dear {Recipient},

I'm so sorry I ignored you at {event/location} the other day. There were several {matters/people} that needed my attention at the time, so I apologize if I came across as rude. Please know that it was never my intention to ignore you. I had actually planned to go up to you, but unfortunately, circumstances prevented me from doing so.

If you're free this week, I would love to sit down and chat with you one-on-one. How does {coffee/lunch} at {name of cafe/restaurant} sound? Please let me know your availability.

Sincerely yours,

{Your Name}

Dear {Recipient},

I apologize for failing to show up to my scheduled interview on {day of the week}. I know this reflects poorly on me as a job candidate, but I assure you I wouldn't have missed such an important appointment unless there was a very good reason.

Unfortunately, {reason for missing interview}, thus I had no choice but to miss my interview. I hope you'll consider rescheduling me. I'm really interested in the position as {reason for interest}.

Thank you for your kind understanding.

Sincerely,
{Your Name}

Dear [Name],

I am writing to apologize for rejecting your application. I understand that you put a lot of effort into preparing your application and I regret that I had to turn it down.

I want to assure you that your application was given the same consideration as all other applicants. Unfortunately, due to the large number of applications we received, we had to make some tough decisions. We had to prioritize certain criteria and unfortunately, your application did not meet those criteria.

I understand that this may be disappointing and I apologize for any inconvenience this may have caused. I hope that you understand that this decision was made with the best interests of the organization in mind.

I want to thank you for taking the time to apply and I wish you the best of luck in your future endeavors. I hope you will continue to pursue your dreams and that you will find success in whatever you choose to do.

Once again, I apologize for rejecting your application and I wish you all the best.

Sincerely,

[Your Name]