Implicature utterance refers to utterance that conveys something other than its literal meaning. For example, a customer conveys intent "what is exchange rate" by saying:

[Example utterance 1] "want’s the best value for sending money to home country"
[Example utterance 2] "what is the best time to change money"

Could you brain storm one scenario for this intent "what is exchange rate"? And generate implicature utterance for that scenario. Provide the entire answer in JSON format.
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