Closing follow up after getting no response

Possible Subject Lines:

• Closing your file?
• Your file will be closed.
• Closing your account.
• Close out this account?

Body Copy: Hey Niles, We are in the process of closing files for the month. Typically when I haven’t heard back from someone it means they’re either really busy or aren’t interested.   If you aren’t interested, do I have your permission to close your file?   If you’re still interested, what do you recommend as a next step?   Thanks for your help. -Neville