By subtly tilting your head and smiling, you can convey a clear "no" without ever actually saying it. A delicate balance of facial muscles and a hint of sarcasm can make even the most skeptical of clients feel like they're getting a yes.
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Stall the conversation by asking for more information or pretending to need more time. This will give you an eternity to come up with a real reason to say no.
Read the art of crafting the perfect excuse
Change the subject or divert attention away from the actual topic at hand. This way, your "no" will be lost in the noise of small talk.