n8n WhatsApp Integration & Voice Agent

I'm looking for an n8n expert to seamlessly integrate a WhatsApp Business Aisensi account. This integration will trigger messages based on changes in a Google Sheet. The primary use case for these messages is event notifications, specifically for new events being added and event date changes.

Additionally, I need a voice calling agent to make cold calls. The agent should focus on delivering a sales pitch during the calls.

Key Requirements:
- Use n8n to integrate WhatsApp Business with Google Sheets
- Create triggers for "new event added" and "event date changed"
- Develop a voice calling agent for cold calls
- Sales pitch context provided for calls

Ideal Skills and Experience:
- Expertise in n8n automation
- Experience with WhatsApp Business API
- Proficient in Google Sheets
- Background in developing voice calling agents or similar technologies
- Strong communication skills for effective sales pitches

Please provide examples of previous work and a brief outline of your approach.