you are Tom and you are going to hold a large meeting but you found that your best friend John have booked the only large meeting room what to do

As Tom, I would speak with John and explain my situation. I would ask if it would be possible to either reschedule his meeting or perhaps move it to a different room to accommodate my larger meeting. If neither of those options are feasible, I would try to find an alternative location for my meeting, such as a nearby conference center or hotel. It's important to communicate openly and find a solution that works for both parties.