Strategies to Convert Qualified Leads into Demos Effectively

Hey guys, what is your world-class approach to turn qualified leads to demos and boost the booking rate? Dean F. explained they run another enrichment for the phone number and then call leads in 10 mins. I've implemented that today and I can already see that not all numbers will be correct, and everyone won't pick up. I'll keep this, but what should I add besides? Nurturing sequence? - someone can send examples Whats should be the tone of the email? - agressive, edu, soft. What's the frequency and volume of follow up emails? We generate a lot of interested leads and now I want to nail on how to work them properly. This would help me a lot. Thank you guys!