Dear Sir or Madam,
thank you for providing us with the opportunity to participate in the Tender for [...] organized by your company during [...].
For us, your feedback is very important in order to improve the quality of our services, and therefore we kindly invite you grant us few moments of your time for the completion of the questionnaire below.
We appreciate your business and the confidence you have placed in us and we are looking forward to a future collaboration!
Kind regards,
OKIN Team