Dear {Manager},

Kudos to your staff for giving us a wonderful shopping experience last {day of the week}.

We were greeted with warm smiles the moment we set foot inside the store. While my {friend/daughter/mother} and I were browsing the {section}, the staff were attentive without being intrusive.

{Staff member's name} was especially helpful when I needed {particular size/color/model}. {He/she} was also very knowledgeable about the products, offering tips and suggestions.

Thank you for the lovely experience. You have just gained two new regular customers.

Sincerely,
{Your Name}

Dear {Manager},

Thank you for agreeing to apply a discount on the {item} I purchased {earlier today/yesterday}. I had been in need of one for quite some time now, but I have had to hold off due to financial restraints. I don't really mind {the scratches/that it's a floor model}, what matters is that it still works.

Thank you for your kind understanding.

Sincerely,
{Your Name}