Er, Receiver? Reasonably or otherwise, someone is entirely and possibly a little smugly (or ironically) satisfied with the outcome of something, and their personal contribution to it.
Receivers somewhat dismayed at such an assertion can communicate a raised eyebrow with
If only or
About time , whereas those wishing to playfully encourage the Bearer have
I can take it or
More with which to do so.
Enjoy introduces a potentially ironic note into proceedings, whereas if the Bearer’s assertion is valid
Fair enough and
Thank you offer courteous acknowledgement.