Subject: INVITATION TO THE 4th ANNUAL CONFERENCE OF [INSERT CONVENTION NAME]
Greetings from [Insert capital city and country]. We would like to invite you to attend the [Conference name] of [city/country], which is held from [date] to date].
We will provide you round trip tickets, and accommodation during your stay in [city] from [date] to date]. It would be also most appreciative if you could have your confirmation of the flight in the near future.
Please give us your full name and send us photo copy of your passport in order to book your ticket. Please fax to us at this number [insert number]. Our official hotel is Manor Classic Hotel in which you will be stay throughout the conference. We will send you the working schedule very soon.
Again, may I take this opportunity to extend a cordial invitation to you from our country. I am looking forward to welcoming you in [city]. Should further detailed information be required, please do not hesitate to contact me to the address below.
Very truly yours,