Dear Sir/Madam,

I am writing to express my disappointment with the recent service I received at your establishment. On the evening of May 1st, I visited your restaurant and was met with poor service, long wait times, and subpar food quality. As a loyal customer, I expect a certain level of quality from your establishment and was left disappointed with my experience.

I would appreciate it if you could address these issues and take appropriate steps to improve the quality of service at your restaurant. I would be happy to discuss this matter further with you and hope to hear from you soon.

Sincerely,
[Your Name]