Serivce Portal Widget add text field

I am adding fields to the Shopping cart in the Angular template large_shopping_cart.html

I added a texarea field and this works fine.

<textarea class="form-control" ng-model="c.requesterPhone" ></textarea>

However a textarea is too big a field for my purpose but I cannot figure out how to change it to a simple one line string field. I tried with "<text></text>" but that becomes readonly.