Nice to meet you. Thank you for inviting me to be your friend! How are things going over there in Munich? And do you have a writing project going? If so, how's it going?
All the best,
"I´ve also sent everything in yesterday, incl. my payment reference number etc. to email@example.com. - still no reply or confirmation :( I´m a bit worried, so I´ve sent another e-mail early in the morning - just…"