Courrier-type en anglais - Remerciements pour services rendus (1)

Dear [Mr or Mrs or Sirs], I just wanted to write to tell you how much I appreciated the favour you did for us last [date]. Had you not interceded, things would have turned a very different way and we would probably be [difficultés] today. It is so comforting to know that one can rely on people like you in case of trouble. Thank you again for everything. Yours sincerely [votre nom] [votre fonction]