The document is an example of a business email from Yuta Watanabe rescheduling a meeting from Thursday at 10am to Monday at 11am due to urgent travel to London. It apologizes for any inconvenience and asks the recipient to suggest an alternative time if Monday does not work. The document then discusses reasons for learning to write business emails, such as using email in society and not wanting to embarrass oneself. It proposes taking email classes at university, practicing with professors, and participating in internships as ways to improve business email skills.