dear sir/madam:
  [organization] eone from your company speak at our conference on [topic].
  as you may be aote. many of our members are interested in the achievements your company has made in.
  enclosed is our preliminary schedule for the conference your company pany representatives to visit our booth at the continental exhibition center from april 15th to 20th .
  other manufacturers.it pany in future.
  exhibition center : the continental exhibition center
  booth number : g-k105 g-k-106
  date : apr 15th to 20th 
  best regards
  mr.su jia jian
  general manager