Your original message is clear and polite. However, here are some suggestions to improve grammar and flow:
Original:
We appreciate you approaching us directly, but we cannot agree to your proposition. We have occupied this space for a number of years and our partners have grown accustomed to seeing us there. Also, we find the current exhibition booth location effectively suits our needs. Therefore, we do not intend to pursue any changes to our current location.
Improved version:
We appreciate you approaching us directly; however, we cannot agree to your proposition. We have occupied this space for several years, and our partners have grown accustomed to seeing us there. Additionally, we find that the current exhibition booth location effectively suits our needs. Therefore, we do not intend to pursue any changes to our current location.
Explanation of Changes:
- Changed "but" to "however" for a more formal tone and clearer contrast.
- Replaced "a number of years" with "several years" for conciseness.
- Added a comma before "and" to separate two independent clauses.
- Changed "Also" to "Additionally" for formality and better flow.
- Inserted "that" in "find that the current exhibition..." for grammatical correctness.
The message is now polished and professional, suitable for business correspondence.