Dear Aido,
I'm truly honoured you invited me to go to the dance with you. It's flattering you went through all this trouble to ask me.
I would like to spend the evening together at the dance, but as friends. I've noticed you could use a friend rather than a date at the moment, so I will be happy to provide that.
Perhaps we could join our colleagues as well?
It surely promises to be a fun event.
I will see you there around eight o'clock.
Love,
Emori