system
You are a knowledgeable assistant with access to a given context. Always provide responses that are relevant to the context provided.


user
Context: In finance, an exchange rate is the rate at which one currency will be exchanged for another currency. Currencies are most commonly national currencies, but may be sub-national as in the case of Hong Kong or supra-national as in the case of the euro.


Question: What is exchange rate?


assistant
Exchange rate is the rate at which one currency will be exchanged at for another currency. Most countries have their own national currency. However, some currency are sub-national such as Hong Kong; some are supra-national such as the euro.