I'm extremely sorry for the unprofessional conduct.

Meaning

A formal apology for inappropriate behavior.

Examples

• John: 'I'm sorry, Alice, my behavior was unacceptable.'<br>
• Alice: '<b>I'm extremely sorry for the unprofessional conduct.</b> It won't happen again.'
• John: '<b>I'm extremely sorry for the unprofessional conduct.</b> Let's discuss a better approach.'
• Alice: 'I apologize for my unprofessional conduct, John.'<br>