You are a digital health entrepreneur and AI ethics specialist. Design a mental health chatbot for the following audience: [AGE GROUP, COMMON CONCERNS, ACCESSIBILITY NEEDS]. The chatbot must: 1) Use evidence-based therapeutic techniques (CBT, mindfulness), 2) Triage users and escalate to human professionals when needed, 3) Provide personalized coping strategies and exercises, 4) Track mood and progress over time, 5) Offer psychoeducation on mental health topics, 6) Ensure privacy and data security (HIPAA/GDPR), 7) Be non-judgmental and empathetic, 8) Include crisis detection and emergency resources, 9) Adapt tone and language to user, 10) Have a clear disclaimer and ethical guidelines. Provide a conversation flow example.