Dual Ground,to help your level of comprehension,try reading the sentence more than once and without blinkers on.Generally if you are visually impaired and require a guide dog then the dog travels with you
If she did as she was asked and rang the reservations people, did they know she was blind? Its reasonably difficult to identify a blind person over the phone, is for me anyway, unless they tell you.
Did she simply say my Tiger flight was cancelled and I want to travel with my husband and my dog?
We don't know the answers so get over it.