HI Ritika,
I wanted to show a page where i need to enter the data coming from two associated entities(order,customer) .This page will be shown onclick of action of button.
Hey
You can create an order object and a customer object and associate them on click of the button ina microflow and then show the page.
On this page you can add a dataview for the order object and a listview by association inside the dataview for customers
You can also add a button add customer above this listview so that the user can add additional customers as it is 1-*, configure this button to create object and select page customer_newedit for it (which will be a pop up page with customer attributes. )