Compare Varieties of English Practice Test

Read the passage: "Good afternoon, Ms. Patel. I am writing to request an extension on my science project. I have encountered unexpected family responsibilities this week. Thank you for your consideration." What variety of English is used in this passage?

Read the passage: "I cannot attend practice today because I have a medical appointment. Please inform the coach that I will return tomorrow. I appreciate your assistance." How does the language differ from informal English?