Answer:
Dear Mum:
I am writing you from my hostel in Berlín. I need you to do me a favor, because it is my bestfriend's birthday I would like you to send him my gifts. It's not just one present, but three important things that mean a lot to him. These things include: a glass of wine, a bottle of wine (then I'll send you another letter telling you which special wine is) and a homemade chocolate bar.
This is an special favor for me because as I told you, is John's birthday and he is a big fan of wine and the combination with chocolates. I just want you to buy these presents and send them next saturday. It is very important for me, this birthday I am far away and I want to be there at least with this little present.
Thank you so much mum!!
Step-by-step explanation:
The person writing the letter is living overseas, that's why he asks his mum to buy an special present for an important friend.