Vouchers, passes, letters of introduction, and printed business cards all work like magic when a confirmed reservation has become unconfirmed. 
It's important to always keep vouchers and passes in case your reservation has been cancelled for no reason.
Vouchers are useless if your reservation has been unconfirmed.
I thought i was better to wait.
A man with works on a sculpture.
Two dogs are looking at an object on the ground.
We are seeking laypersons' expertise on NEPDG information.
The three people were walking by purple cones on the road.
A purebred golden retriever rolls around in the grass.