Perfectly normal in my 37 years of experience; you should always have pen and paper handy to jot things down.
I once had a pair of DC8s 2000ft apart on top of each other; the lower one (FL330) was directly below the upper one (blips were merged) and must have had it in sight when he suddenly asked 'London Air Canada XXX request FL 370' .
Before I had chance to answer, my support controller immediately said on intercom 'he can have thirty seven if you can get him there' so that's what I did with a minimum of RTF.