a. Well. I love the interactive nature of the course and the helpful feedback from the instructors.
b. That's great to hear! It really helped me improve my skills, too.
c. Hi Lan, guess what? I've enrolled in the calligraphy course you recommended last week. Thank you for your recommendation.
d. I can't wait for the rest of the course.
e. No problem. How are you finding the course so far?