Brevity is the soul of sales. This is doubly true of cold calling because no one wants to answer the phone and hear a strange windbag urging them to spend money.
The perfect opener is a greeting followed by a single sentence. Two sentences are the absolute max:
“Hello Jackie. This is Askari from Lawn Pimps. I’m scheduling my route for the spring and I want to make sure that once the weather breaks I can get back out there and take care of the grass for you.”
Remember: 95% of people will not buy. Why waste words? Save your A game for the real customers (the ones who show interest).