Phrases Apologies and Excuses

I'm really sorry about that.

B2

Meaning

I apologize sincerely.

Example sentences

John: 'I'm really sorry about that. I'll make it up to you.'

Alice: 'Thank you. That means a lot.'

John: 'No problem.'

Alice: 'I'm really sorry about that. I hope I haven't caused too much inconvenience.'