Subject: A Musical Evening at the Park!

Dear Sam,

I missed having you at the concert yesterday! I attended the event with our mutual friend, Alex. The band played a delightful mix of jazz and blues, which set a lively atmosphere. After the concert, we grabbed dinner at a nearby food truck, indulging in some delicious tacos.

Looking forward to catching up soon!

Best,
[Your Name]

Feedback and Suggestions for Improvement:

1. Answering Questions: Make sure to answer all the questions asked in the email. In this case, you need to mention who you went with, the type of music played, and what you did after the concert.

2. Tone and Style: Since Sam is a friend, a casual and friendly tone is appropriate. Use conversational language and phrases to make the email sound natural and engaging.

3. Details: Adding specific details can make your email more interesting. For example, instead of just saying "we had dinner," mention what you ate and where you ate it.

4. Vocabulary: Use a variety of vocabulary to make your email more engaging. For example, instead of just saying "the music was good," you could say "the band played a delightful mix of jazz and blues."

5. Sentence Structure: Vary your sentence structure to make your email more engaging. Use a mix of simple, compound, and complex sentences.

6. Word Count: Ensure your email is at least 25 words long. It's better to write a bit more to provide sufficient details and make your email engaging.