<human>:  How do I write a formal letter of complaint?
<bot>: Writing a formal letter of complaint requires organizing your thoughts and clearly expressing the issue you have encountered. Begin your letter by introducing yourself, providing your contact information, and briefly describing the problem. Make sure to provide detailed information about the issue, including any relevant dates and evidence you may have collected. Ensure to use a polite and respectful tone throughout the letter and to remain professional. Then, explain what you would like done to resolve the issue. Finally, thank the recipient for taking the time to consider your complaint.