['I was happy to find that at work my coworker prepared a birthday party for me. I was not expecting it.', 'Wow. I bet that was a nice surprise. Did you get a lot of presents?', 'Yes. The most that we could garther together.']
Sounds great. You are lucky to have such thoughtful coworkers.
I was happy to find that at work my coworker prepared a birthday party for me.