Average time period customers cancelled room before check in date
Number of cancellations per month
Which rooms are requested most big money rooms or average rooms.
How many smoking rooms
how many non-smoking rooms
How many pet rooms if applicable
Payment methods - Check/cash/AMEX/Discover/etc
How many people requested multiple rooms (maybe they need to make some larger suites)
Average length of stay
That should get you started
Folks he's trying to find questions a manager would ask a data analyst for reports on the hotel performance etc.