These are just routine, so don't make a fuss. This is also the company's expansion business. It is also the company's loss if it doesn't win the bid. The company will also participate in the next bidding, as long as it writes a decent profile.

Let's write it like this:

Thank you for your support to our company. Failure to cooperate with your company is our loss. I sincerely hope to have the opportunity to cooperate with your company and wish your company a prosperous business.