Dear [Guest's Name], On behalf of the organizing committee, I am writing to confirm your attendance as a guest speaker at the upcoming [Conference/Symposium] to be held in [City, State] on [Date]. We are delighted to have your expertise contribute to this event, and we are confident that your insights will greatly benefit our audience. The [Conference/Symposium] aims to bring together professionals and experts from various fields to exchange knowledge, network, and foster collaborations. With its focus on [Conference/Symposium Topic], this event promises to provide a platform for thought-provoking discussions, interactive sessions, and cutting-edge research presentations. As a guest speaker, you will be a valuable addition to our roster of esteemed speakers. Your extensive experience in [Guest's Area of Expertise] makes you particularly qualified to discuss [Specific Topic/Theme]. We believe that your presence will greatly enrich the conference program and that our attendees will greatly benefit from your insights and expertise. As part of your participation, we kindly request you to deliver a [Length of Presentation] presentation on [Title of Presentation] during the [Conference/Symposium]. Additionally, we would also like to extend an invitation for you to participate in a panel discussion or Q&A session regarding your area of expertise. We will provide a formal agenda and schedule closer to the event date, outlining the details of your session. To ensure smooth arrangements and a successful event, we kindly request you to confirm your attendance by [Deadline Date]. Please let us know if you require any specific audiovisual aids or technical support during your presentation. We will do our best to accommodate your needs. Additionally, if you have any specific requirements or preferences regarding accommodations, transportation, or dietary restrictions, please let us know as soon as possible so that we can make the necessary arrangements on your behalf. We are confident that your presence will greatly contribute to the success of the [Conference/Symposium]. Your unique perspectives and insights will undoubtedly be invaluable to our attendees, and we look forward to receiving your positive confirmation of attendance. Should you have any questions or concerns, please do not hesitate to contact our team at [Organizer's Contact Information]. Thank you for your time, and we eagerly anticipate your participation. Sincerely, [Your Name] [Your Title/Position] [Event/Organization Name] [Contact Information]