Standard English-Native English He informed me beforehand - He gave me a heads-up I'll start working on it immediately - I'll get right on it That's an easy decision - It's a no-brainer That's not very realistic - That's a bit of a stretch It was missed by mistake - It slipped through the cracks That's not clearly defined - It's a grey area She drew my attention to it - She flagged it for me I don't know - I'm not sure off the top of my head I'm not available - I'm tied up Can you help me? - Could you give me a hand? You need to decide - You need to make your mind up That's simple - That's pretty straightforward I'll contact her - I'll reach out to her I'm not interested - It's not really my thing Wait a moment - Hang on a sec