Find a pattern within field's value using regular expression Kibana UI

Hello,
I am trying to find a pattern within the field using regular expression and it's not working the way I think it should.

The field is message.ApiData.ResponseBody and it contains a JSON response. It is a collection of multiple objects with "price" property. I am looking for ResponseBody that contain only the 0.00 prices. I tried to find those that do not contain "price":digit digit. to no avail . below is what I used

NOT message.ApiData.ResponseBody : \"price\"\:\d\d\.
Thanks in advance

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