Respected Sir/ Madam,
I write this email with the utmost respect to inform you that our company is going to organize an annual dinner for ____________ (mention). This is to inform you that the event is going to organize on __/__/____ (date) and the timings would be _______ (mention timings). Our company is looking forward to giving sponsorships opportunity to the ___________ (business partners/ local dealers/ any other).
Therefore, in case you find yourself interested in being a sponsor for this event, you may contact us at the contact details mentioned below. Moreover, please find attach _______________ (name of the documents) documents along with this email.
__________ (Your name),
__________ (Contact number)