Custom ChatGPT Integration for Website

I need a skilled developer to integrate a custom ChatGPT chatbot into my website. The bot should proactively greet users and answer their queries.

Key Requirements:
- Integrate ChatGPT into my existing website.
- The bot should be able to answer user queries.
- The bot should proactively greet users to initiate conversations.

Ideal Skills and Experience:
- Experience with ChatGPT and similar AI integrations.
- Proficiency in web development.
- Strong UI/UX design skills to ensure a user-friendly interface.
- Ability to test and troubleshoot the integration.

Please provide examples of previous similar work.