Odpowiedź:
Hi, ( imię kolegi lub koleżanki)
Thanks for the invitation you gave me to go to the muzeum with you. As much as i would like to go with you to the muzeum on Thursday i can't. I'm busy on Thursday, i have karate class at 4:00 and later that day i have to visit my grandmother at 6:00. I hope you can understand. Don't worry we can still go to the muzeum together, how about monday after school? I look forward to hear from you.
best regards, ( twoje imię ).
Wyjaśnienie: Powinno być dobrze życzę miłego dnia oraz liczę na naj.