The context of the following conversation is It was Tracy's birthday and her friends threw her a surprise party, Tracy opened their gifts.:
Tracy says I thought everyone forgot about my birthday..
The friend responds When was your birthday?.
Tracy responds It was yesterday and my friends threw me a surprise party..
The friend responds I'm sorry they didn't include me in their plans..
Tracy responds You really missed a nice time, and I was able to open their gifts..
The friend responds I'm sorry I missed it..