I need a lightweight, web-based chatbot that can greet visitors to my crypto service, answer their most common questions with basic text replies, and step in automatically whenever I’m away from the keyboard. No multi-language layer is required—the bot will operate in a single language and does not need to touch live cryptocurrency transactions. Core expectations • Embed easily on my existing site (a simple JS snippet or iframe is fine). • Editable knowledge base so I can add, remove, or tweak answers without diving into code. • Clear fallback: when the bot cannot match a question, collect the visitor’s email or open a ticket so I can follow up. • Conversation logs stored securely and downloadable. • Clean hand-off: full setup instructions plus a quick walkthrough call once it’s live. Feel free to build with the stack you know best—Dialogflow, Rasa, Node.js, PHP, or a custom vanilla JS solution—so long as it runs smoothly in the browser and is easy for me to maintain.