Possible Clues:

• 1972 Bill Withers hit
• "I'm here to help"
• 1972 hit for Bill Withers
• 'I'm at your disposal'
• "I'm at your disposal"
• Bill Withers hit of 1972
• "I'm available"
• "I'll do whatever you need"
• 'I'm at your service'
• 1972 #2 hit for Bill Withers