chat_history: ["I recently took my ELS certification test. I studied really hard, so I'm sure I passed it.", "What's ELS?", "Sorry, ESL. It's English as a Second Language. It just means I am certified to teach students that don't speak fluent English."]
sys_response: Ah, gotcha. A few of my friends teach English to Chinese students online and I think they have taken ESL courses
situation: I studied very hard for my ESL certification, and was sure I would pass the test going in.