Dear Richa,
This is to put on record our appreciation for the work you have done at our place.
Your unique method of effective consulting included:

1. Providing information to us. 2. Solving our problems. 3. Making a diagnosis, which necessitated the redefinition of the problem. 4. Making recommendations based on the diagnosis. 5. Assisting with implementation of recommended solutions. 6. Building a consensus and commitment around the corrective action. 7. Facilitating our learning—that is, teaching us how to resolve similar problems in the future. 8. Permanently improving organizational effectiveness.