How do I reply to this email?

I know I did everything correctly, as I've had problems in the dim distant past (with a resultant negative).

 

A case for non-payment was closed yesterday & I have already offered the item to the under-bidder after the case was finalized (not sure whether he/she is going to buy as yet).

 

This morn I got the following email from the original buyer - "Hi, apologies about this. I had a family emergency whereby I was unable to complete my ebay transactions.  Cheers, (given name)".  This email was in response to an email I sent on Aug 31 (I waited another 24 hours (after sending it) before issueing the NP dispute).  

 

It seems to be a statement not a query, so how do I reply to this email or not reply at all?