Dear_________,

　　I am writing this letter to express my sinceregratitude for___________.Had it not been for yourassistance in ___________,I fear that___________may not have____________.I’d likeyou to know that your help __________.It notonly____________,but also__________.I shallalways remember__________.

　　I hope that I will have the opportunity ofreturning your hospitality by inviting you to______.Will you kindly let me know whether you____________?I am looking forward to seeingyou soon!

　　Again,I would like to express my thanks to .Please accept my appreciatin and pass my bestwishes on to ____________.I hope to hear from you soon.

　　Yours,

　　___________