Good Morning Phusiri,
Thank a lot for your answer.
We just realized that we made a mistake about the reservation (it was late yesterday night) :
We wanted to make a reservation for 30.04 and 01.05 instead of 29.04 and 30.04.
Do you think it's possible to interchange the dates ?
Because on 29.04 night we will be in the train to Chang Mai...
I really hope you'll agree to fix our mistake :)
M-A