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I think they all sound nice and professional. I like the pacing on 3 and 4 a little more. Just a little bit slower, especially between “long wait” and “if you prefer”. Seemed just the slightest bit rushed there in 1 and 2 but open and natural on 3 and 4. Only technical thing I heard that caught my attention was an inhalation at the end of #3 just after all the dialogue had ended. I would edit that out since it doesn’t lead into anything. Otherwise sounds very nice