Signature Options in Reply

Currently, you can have your signature included with all emails or new conversations only. It would be nice to have an option when replying to an email to quickly insert your signature. I find most replies I send within my organization do not require my signature, however, I would like to include this when I reply to external/customers. I currently have to open a new email and copy and paste it over. Attached is a screenshot from outlook with the quick insert option.