Transferring client details from page to page to checkout

Hello I hope someone can be of assistance and help out. I am very new to this and would love some help I have tried looking online and for videos but cannot seem to get spot on info.

So I have 1 page ( reservation page for an item ) At the end I have a submit button leading to the next page.
Page 2 is an upset page which has one more user input ( dropdown menu ) and then a confirm button to page.
Page 3 which is where I wish to charge the client with the info they have put in the pages above.

Thank you Reiss

Just look at using Wix Storage to save them and recall them when needed.
https://www.wix.com/corvid/reference/wix-storage.html

Otherwise, if you are saving them to a dataset with your submit button, then simply get the needed items on the page using getCurrentItem and set the field values by setFieldValue or setFieldValues and saving it again.
https://www.wix.com/corvid/reference/wix-dataset.Dataset.html#getCurrentItem
https://www.wix.com/corvid/reference/wix-dataset.Dataset.html#setFieldValue
https://www.wix.com/corvid/reference/wix-dataset.Dataset.html#setFieldValues
https://www.wix.com/corvid/reference/wix-dataset.Dataset.html#save

Just a note, if you use getCurrentItem, then it will get all the current data from that row, if you only want a specific field from a dataset, then just use getCurrentItem().fieldName;