How get lastmonth records in List records Action in MS Flows

Hi Everyone,

How can I get the records created in last month using 'List records' action of MS Flows. I don't see any operator for LastMonth in OData query like Fetchxml (<condition attribute="createdon" operator="last-month"/>). I tried the LastMonth() function but it is not working in Flows.  My Flow will execute on 1st of every month and I have to get all the records created in last month and process something. I even thought of having 2 parameters (Start Date and End Date) and use less than (<), greater than (>) operators but the end user has to change the dates manually before the execution of Flow which is not robust approach. Please show me some way in this regards.

Thanks,

Phani.