Proofread and correct the following passage, adding periods, question marks, and exclamation marks where necessary. You should find ten (10) errors to correct.

David, a medical assistant, was working on Saturday at the nursing station in the Department of Hematology/Oncology. Part of his job was to greet patients’ friends and family members who came to the department on visits.

At about 10 a.m., an elderly woman came up to the nursing station with a question. She was a short woman, who had to stand on her toes to see over the desk to speak to David. She seemed very confused.

"Do you know where the Department of Cardiology is”is?” she asked., “Is this the Department of Cardiology.”Cardiology?”

David knew that Cardiology was over in the next wing of the hospital and two floors up. He worried that if he gave the woman directions, she might get lost again. He wanted to provide the best service possible to her.

"It’s quite a ways from here,” he said. “I’d be happy to escort you there to make sure you find it.”

The elderly woman smiled a bright smile to David, “Thank you so muchmuch! That’s the nicest thing anyone’s done for me today”today!”