Dear sir/madam:
Thank you for your letter of [date]。 I’m glad that you are also going to [place] next month. It would be a great pleasure to meet you at the [exhibition/trade fair]。
Our company is having a reception at [hotel] on the evening of [date] and I would be very pleased if you could attend.
I look forward to hearing from you soon.
Yours sincerely,
[name]
I would hereby invite the members of Beijing delegation totally 4 persons (listed attachment) led by you, to come over to xx(country) for *** (exposition)， which is to be held at *** (place)during *** (date)。
Please make the necessary arrangements for your delegation to arrive in *** (country)。
During the exposition, you will stay here for *** days。
All your expenses including international air tickets, local transportation, accommodations, medical insurances and all other related expenses during your stay here will be paid by yourselves。
We are looking forward to greeting you in *** (country) very soon。
Yours sincerely, (Signature)
Dear Aunt Kate,
David and I are to be married at the Community Church on Thursday, June the twelfth, at noon.
We want you to come to the ceremony, and also to the wedding banquet afterward at home.
We’ll be looking for you, Aunt Kate, on the twelfth!
Affectionately yours,
Helen
20XX年6月6日