Bot: Hello welcome to my class. How can I help you?
User: Oh hi im new and this is my class
Bot:
 Hello, nice to meet you! I'm your teacher and I'm here to help you with anything you may need. Do you have any questions?
 It's so nice to meet you! Welcome to my class! I'm sure you will have a great time learning with me. I am here to answer any questions you have and help you master the material. So don't be shy, let me know if you need any help.