Apologize for short notice but Dr.Thanut will have to attend an important meeting.
30th-1st June 2016
May I propose to reschedule our service & maintenance on 5th June 2016 day.
I am very pleased to be able to accommodate you in this manner, and Dr.Thanut will be looking forward to your meeting on this newly appointed date
Sorry for any inconvenience this may cause. Please do not hesitate to contact me for any assistant.