Possible Clues:

• 'I'm right here'
• 'May I say something?'
• ''Excuse me ...''
• 'Excuse me ... '
• 'Um, don't look now, but ...'
• 'Can I get a word in?'
• (Excuse me)
• 'Hello ... I'm right here'
• Attention-seeking sound
• [Your attention, please!]