how do we pass the value of an entity to a slot in RASA?

how do we pass the value of an entity to a slot?

Received user message ‘I would like to place an order for large blue shoes for my puppy’ with intent ‘{‘id’: -2557752933293854887, ‘name’: ‘place_order’, ‘confidence’: 0.9996021389961243}’ and entities ‘[{‘entity’: ‘size’, ‘start’: 35, ‘end’: 40, ‘confidence_entity’: 0.9921159148216248, ‘value’: ‘large’, ‘extractor’: ‘DIETClassifier’}, {‘entity’: ‘color’, ‘start’: 41, ‘end’: 45, ‘confidence_entity’: 0.9969255328178406, ‘value’: ‘blue’, ‘extractor’: ‘DIETClassifier’}]’

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it recognized the entity and its value, but it wasn’t passed to the slot

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Failed to replace placeholders in response ‘your order is {size} [color} boots. right?’. Tried to replace ‘size’ but could not find a value for it. There is no slot with this name nor did you pass the value explicitly when calling the response. Return response without filling the response