[Date]

Dear [supervisor’s name],

This is a request for approval to attend the 2014 High Horsepower (HHP) Summit, scheduled to take place October 7-9 in New Orleans, Louisiana. Now in its third year, the HHP Summit is North America's largest and most engaging conference on the use of natural gas to fuel high horsepower operations—including marine, rail, mining, drilling and pressure pumping applications.

HHP Summit examines the topics and technologies that can make the shift to natural gas in high-fuel-consumption off-road operations a reality. The multi-day conference provides unrivaled educational value through:
•	Exciting natural gas case studies from current high horsepower users
•	The latest OEM technology and retrofit options
•	Fueling supply and refueling infrastructure solutions
•	Regulatory and policy considerations
•	Real world project economics and how to achieve ultra-fast ROI

The conference offers multiple hosted networking events so I can engage with professionals from across the high horsepower industry in discussions that are directly related to initiatives I’m currently working on, such as __________.

I am seeking approval for the registration fee and travel expenses associated with the conference. The early bird registration fee is $450, which is significantly less expensive than other natural gas conferences. 

Estimated breakdown of my cost to attend HHP Summit 2014:
Roundtrip airfare: 	{$XXX}
Transportation:		{$XXX}
Hotel:			    {$XXX}
Meals*:			    {$XXX}
Registration fee:	{$XXX}
Total cost:		    {$XXX}
*Several meals are included in the HHP Summit conference fee.

Following the conference, I plan to share the key insights I’ve learned with my colleagues. I assure you that my attendance at HHP Summit 2014 is a wise investment that will bring considerable value to [company/organization]. 

Thank you for your consideration,
[Your name here]