I should have V3

I’m really sorry ...

It’s my fault.

I’m so sorry to V1

Sorry about that!

There’s no need to apologise

It’s not a problem.

It’s not your fault.

Sorry I got upset.

Don’t worry about it

It’s OK.

It’s just one of those things

I couldn’t help it

Don’t blame me

Look, it was an accident!

It could have happened to anyone.

if you’d been more careful…