Thank you for contacting Acme.  How may I help you today?
Hi.  My name is Norman Bouchard.  I noticed that these Calvin Klein jeans are priced at $89 today, but yesterday they were cheaper.
Oh, I'm sorry to hear that Unfortunately, our prices are set by algorithm, based on a lot of different factors which are, sadly, all out of my control
So I cannot get a price adjustment if I buy the item today?
may I ask your name, so that I can take a look at your account.  There may be something I can do
I already gave you my name.  My Account ID is NH0SBZF1QX if that helps.
Oh, yes, sorry about that

Based on your purchase history with us, I will be able to issue a promo code for this specific item, that should cover the difference
That's very nice of you.  Thanks.
3D42Q should cover the difference
Ok great.
But don't tell anyone. This is only for our more valued customers, such as yourself Would there be anything else I can help you with while we're here?
That is it for today.
Okay, have a good day, Mr Bouchard