Examples:

• Any number of things, but unfortunately I'm here on business.
• I'm here on business, looking for a woman.
• Actually I'm here on business just for the day.
• I'm here on business, and time is of the essence.
• I'd love to, kemo sabes, but I'm here on business.
• I'm here on business for the day, that's all.
• I told you, I'm here on business, okay?
• But actually, I'm here on business.
• Well, I'm here on business, the rest of my time's free.
• Well, I'm here on business, actually.