I was glad to receive your letter of ……
With great delight I learn that……
I have the pleasure to tell you that……
I have just received your kind letter.
Your kind letter of ……arrived this morning.
As I have not heard of you for a long time, I feel anxious……
I was so glad to have your letter yesterday.
Your letter of…… was duly received.
I have just received your kind letter dated……
I have been meaning to write for a long time.
I know I should have written long before this.
We were pleased to know from your letter of……
In reply to your enquiry of…… I enclose……
2. Closing Sentences
I hope to hear from you soon.
I look forward to our next meeting.
Your kink early reply will be appreciated.
Won't you let us hear from you promptly.
Any other particulars required I shall be pleased to give you.
The help you send is sincerely valued.
Hoping for an early reply.
Looking forward to hearing from you.
Remember me to your……
Present my compliments to……
You have my best wishes for your continued success.
I hope I shall receive your favorable reply.
I would be grateful if you could let me know as soon as possible.
Your prompt attention to this matter is appreciated.
We highly appreciated for your kink co-operation in this matter.
Your early attention to this matter is highly appreciated.