怎么写英语邀请函和回复

例如为某人办理邀请函。
To:
The Immigration Department Visa Section
Dear Sir/Madam,
Re: Assistance Required forVisa Application for the Person Listed Below
Reference is made tothe above caption,
We wish to extendan invitation to the below mentioned person to visit *** for business purposesfrom the months of February, 2017 to March, 2017.
We request theEmbassy of ***** to kindly support him with a visa and we at ****** hereby accept all economic, immigration and guarantees for anyexpenses (including accommodation and transport,etc.) that Mr. PENG may incur inconnection with his forthcoming visit to ******** Particulars of his passport are as follows:

Name as in Passport:
Passport No.:
Date of Birth:
Date of Issue:
Date of Expiry:

We thank you foryour assistance to the above matter.

Yours sincerely,
**********************************************
Name:
Position: Managing Director