I sincerely appreciate your help, thanking what you have done for me. I appreciate thesupport you have provided and your assistance has been invaluable to me.First of all,________,I firmly believe it is of great significance to me. I did learn a lot fromyour calmness and ration in face of problems. In the end,I wish there will be a chance to repay itone day.I wish there were a better word than ' thanks" to express my appreciation for your generoushelp. Keep in touch!