I suppose to reassure them of the personal touch -- that this isn't a copy+paste response. But to me it usually feels forced. Much better to find a more natural way to remind them this is a personalized message, like referencing their situation. "As this is an urgent request, Jennifer, we can provide..." vs. "As this is an urgent request due to your upcoming status meeting, we can provide...".
I don't think it goes very far to reassure me that a response is copy/pasted or machine-written. My name could be as easily pulled from a database as from someone's memory.