Could I ask you for a small favor?

Meaning

Politely asking for a favor.

Examples

• John: 'Could I ask you for a small favor? Could you water my plants while I'm away?'<br>
• Alice: 'Sure, I'd be happy to.'
• John: 'No problem, I'll be glad to.'
• Alice: 'Could I ask you for a small favor? Could you pick up my dry cleaning?'<br>