IPCG 2023 as well as the GRS portion of the conference are not dealing with outside booking agencies.
Any email offering to help book your accommodations is a phishing scam. You will register yourself through the registration tab: https://ipcg.info/ipcg-conference-2023/registration/
Your registration covers accommodations, meals, and the seminar sessions. You will book these details yourself and no external companies have been contracted for this.
PLEASE IGNORE/DELETE ANY REQUESTS FOR TRAVEL OR PAYMENT DETAILS!