3 Kenta Kato

EDITED VERSION BELOW
Dear Mr.Sam Sprite,

I am writing (on behalf of Paul Revere) regarding your trip for the meeting in Japan on behalf of Paul Revere.

Please see (a summary of your itinerary below) below for breif information .

7:00 P.M, June 7 (Wed): Set off from Vancouver airport

????P.M, June 8(Thu):Arrive at Narita airport, Check in at Loyal Hotel

1:00P.M, June 9(Fri):Have pre-meeting at Tokyo ???

Saturday and Sunday... extraday (extra time), in case you don't complete the pre-meeting

2:00P.M (Mon):Meeting

From Tuesday to Wednesday, you will (be able to) spend time on following up (with your contacts)

7:00P.M(Thu):Leave Japan

For more detailed information, please find attached the (attached) file (containing your full itinerary).

I believe your trip will be productive and meaningful.

Best regards,

Kenta Kato executive assistant

JONATHON'S NOTES: Your message is good overall, but in a few places you have mixed up your word order or left out some important phrases. Check how I've edited it and fix it up. Good luck on your future writing assignments.