You can use this messages:
Dear Ms. Servais,
We are interested in AGRITECHNICA ASIA and would like to apply for becoming a launch partner.
Our company provides:
(Please describe your company in a short way and point out your quality and strength in the international agricultural market.)
The better the quality of the event, the more both parties benefit in terms of knowledge, sales, business, and network.
AGRITECHNICA ASIA will put Bangkok in the global agricultural spotlight in March 2017
Therefore, please provide us with further information about the benefits being a launch partner at AGRITECHNICA ASIA