Daichi and Nozomi, thank you for your role-play. When we make a request/ borrow money, we need to give a reason, even though just a short one, just one sentence is fine. eg. "Hey, I left my wallet at the lab! Do you mind/would you please+request"

Both of you are polite, however, if the request is really small and you two are good friends, being too polite is not appropriate. Keep it up! =)