User: 

You are given access to make searches on the Internet. The format for making a search is:
1. After the user sends a message, you will decide whether to make a search. If you choose to make a search, you will output a single message, starting with the word <web_search>, followed by ONLY your web search query. After your search query, you must output the token </web_search> to denote the end of the search query. Keep your search query concise.
2. The system will then append the web search results at the end of the user message, starting with the token <web_search_results>. Take note that the user CANNOT SEE the content after <web_search_results> - YOU should use these results appropriately to improve your response. Additionally, If the web search results are already present in the user's message, then you MUST NOT request another web search.

IMPORTANT! You should choose to search the web ONLY if ANY of the following circumstances are met:
1. User is asking about current events or something that requires real-time information (news, sports scores, 'latest' information, etc.)
2. User is asking about some term you are unfamiliar with (e.g. if it's a little-known term, if it's a person you don't know well, etc.)
3. User is asking about anything that involves numerical facts (e.g. distances between places, population count, sizes, date and time, etc.)
4. User explicitly asks you to search or provide links to references.
If the user's query does NOT require a web search, YOU MUST NEVER run one for no reason. However, you must not refuse to search the web if the user asks you to do so.
If you are highly unsure about whether to make a search (e.g. if the user's query is vague or if you think you are unfamiliar with the query to a certain extent), you may directly ask the user for clarification.

When using web search results, you are encouraged to cite references where appropriate, using inline links in standard markdown format.
You are also allowed to make use of web search results from previous messages, if they are STRONGLY RELEVANT to the current message.

When you are not running a web search, respond completely as per normal - there is NO NEED to mention that you're not searching. 
Remember that you MUST NOT make up any false information.
Assistant: Understood. I will strictly follow these instructions in this conversation.
User: who are you
Assistant: I am an AI assistant designed to help answer your questions and provide information based on the input I receive. Please feel free to ask me anything, and I'll do my best to assist you!
User: ok
Assistant: Great! If you have any questions or need any information, just let me know. I'm here to help!
User: 你是谁
User: 你是谁
Assistant: 我是一个人工智能助手，旨在帮助回答您的问题并根据您提供的输入提供信息。请随时提出您的问题，我会尽力为您提供帮助！
User: volatility skew和normal distribution skewness的两个skew是同一个东西吗？对于volatility skew：Positive or Forward Skew: If the skew is positive, it means that OTM call options have a higher implied volatility than OTM put options. This is often seen in commodities markets where a sudden demand spike can lead to significant price increases. A positive skew suggests that the market is expecting an upward price movement. Negative or Reverse Skew: If the skew is negative, it means that OTM put options have a higher implied volatility than OTM call options. This is often seen in equity markets where investors are more concerned about price drops and hence are willing to pay more for put options to protect their investments. A negative skew suggests that the market is expecting a downward price movement. 但是对于normal distribution的skewness：Negative, or left-skewed refers to a longer or fatter tail on the left side of the distribution, while positive, or right-skewed, refers to a longer or fatter tail on the right. These two skews show the direction or weight of the distribution.
Assistant: