... To not tell the boy I like about my crush on him? To make sure and bring the Tardis back in five minutes? To deliver me from zombies in the apocalypse?
If it was a busy hotel, or a reputable car insurance company, sure. But I make it a habit to not stay in abandoned hotels or buy freelance insurence, so I can't be of much help.
Over all, there's huge reason /not/ to trust her... Although she looks a bit witchy.