how can i reply positively in a proper way?

For our local office in ............ , we have selected a design company for internal architecture and now, we would like to launch a Request for Proposal (RFP) to identify construction company. In view of the same, .............. which could provide the best possible service and optimum tariffs was referred for the construction work by our partner ............. .

Please confirm your interest to participate in RFP so that I would provide necessary details for you to submit your offer.

Please let me know in case you have any questions.