Instead of pausing, have the user, while in Browse mode, enter that text into a global field. You might even set up two global date fields for this purpose.
Then they can click a button or trip a script trigger to perform a script that uses the data in the global field(s) to perform the find. Since your data is now in a global field, you can include these same global fields on your layout (or a calculation field that formats them) to show the find criteria used.
See this thread for some scripted find examples: Scripted Find Examples