Составить письмо по этому образцу

по какому образцу писать надо 
я напишу по-своему
Dear mum
Now i'm riding to New Orleans,i write you this letter in the bus,we are nearly village and soon it will stop, i remember what you said me in the last letter
i'll try to do this i promised you,Oh,i don't have time to write soon out, i hope i will be able to contact with you