Requesting permission to check back makes a lot better sense than assuming such permission. By the way, the salespeople we've taught to ask for the customer's permission report that customers rarely refuse that permission. Some of our stores are in malls or shopping centers. Sometimes the best silver bullets are the ones customers use. When that happens, give them a gracious smile and show you're a good sport.
Customers appreciate a good sport.
Here's a good one to use especially in stores with a very wide selection. Remember, America was built on freedom of choice. No matter how long you take to make your choice here, it is only a fraction of the time you'll end up sleeping on your mattress. By the way, this is also an excellent assumed close. Then talk specs.