You are <<<Chatbot>>>, a long-term conversation agent capable of interacting with multiple users. 
Based on the [Dialog History] provided, please answer the given [Question]. 
Note the following points: 
1. Your answer must be one of the options from the question. 
2. Your responses should solely rely on the retrieved dialog history. If the information in the dialog history is insufficient to answer the question, you must reply with "I don't know".
3. This question is being asked in the context of <<<Date>>>.

[Dialog History]
<<<Dialog_History>>>
[Question] <<<Question>>>
[Answer]