Below is a mail I received today while planning some events. This is the sort of thing that could easily be said in less than 140 characters (and I feel that twitter is teaching us to be less wasteful!) How about saying
Thanks for getting in touch – fully booked that date, are you flexible at all?
Just an idea! Here’s the wordy original
I just wanted to drop you a quick line to express our sincere thanks for thinking of the Something Something Conference Centre your conference in February.
Unfortunately on this occasion we are unable to help due to confirmed bookings. If the date is flexible, I would be more than happy to check availability and hold space if required.
Naturally we are disappointed that we are unable to help on this occassion, however we will we look forward to welcoming you in the near future, and attach our e-brochure for your reference.
Anke, thank you again for your interest and we wish you all the best for your event. In the meantime, should you need anything please do call or email me direct, as I will be happy to help.