Your calls have improved a lot.
When we used "improved", it's obvious that there is a comparison of something now compared to what it was like before.
(I guess these sentences are all criticisms of a Call Centre employee, or something similar).
2. “Adding pleases to your sentences will make them sound like a request rather than a command.”
3. "From your notes, it appears that it was only at the end of your call that you confirmed that you were talking to that [specific] customer. This is disappointing."
This one is difficult to understand. I think it means that the employee should have established that he was talking to Mr Smith early in the call, rather than waiting until the end of the call.
I don't like "confirmed if".
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