Dear Dr. Wiwat,
I have to be in NECTEC at the Science Park, Pathumthani, on 20th Wednesday afternoon.
I could know that you would be busy on 20th and 21st every morning. Then, it will be appreciated if you would find a time on 21st Thursday, afternoon. I will return to Tokyo on the day, but I think I can stay in Skhumbit till 17:00, to get on the flight JL34 with 22:35 take-off in time.
I am looking forward to your reply.
Sincerely yours,
Kenzo Takahashi