["I was going to go to a work picnic today, but it didn't happen thanks to rain.", 'That is unfortunate. Did they reschedule the picnic?', 'Yes, we will try again next week. I was mad about it but now I feel okay.']
I'm glad you feel better knowing that it will happen next week.
I was going to have a picnic at work today but it began to rain, so I felt pretty ticked.