Using a pre-built datetimeV2 object to capture the daterange

I am using a pre-created datetimeV2 object to capture the daterange. I use it to match two different statements - this week and two dates in particular. How do I map it in the FormFlow model?

What I want to do is -

Search all flights this week

or

Search all flights between today and 7/10/2017

The LUIS object is fixed exactly, but I cannot map it to the FormFlow model - my model contains fromDate and ToDate. How do I map one matching Luis Entity to these properties?