chat_history: ['I just celebrated my birthday and it was so much better than usual.', "That's great. What made it so special this year?", "I usually don't do much to celebrate but this year a friend of mine got all my other friends together to throw a party for me without me knowing. It was a great time."]
sys_response: Sounds like fun! I'm glad you had a happy birthday.
situation: A friend of mine got all of my friends together to throw a party for me on my birthday. I never expected it as I typically don't do much for my birthday.