It's a simple trick and takes less than 20 seconds inside Power Query.

Use the Microsoft Bookings app to manage your Hybrid work needs from inside Teams. Book a desk before you go into the office and have visibility of who is sitting where. Perfect when you need to be socially distant.

Pin to find later, Mute if the chat is too noisy and now you Delete - use the three dots next to the Chat to find delete and clear your chat history of any irrelevant chat messages.