Soldier is always soldier

When I was driving for some time, I know in which hotel Joe is staying, as it is the only one here. While I was driving there, I choose his number. As I was calling him, after changing to the speaker, he answered, so I said, "in which room you are."

"Oh, let me see," he said while having a sleepy voice. As I started waiting for some time, he added, "fifth hundred fifteen."

"OK," I said.

"For what you need this information," he asked.

"Oh, I will be there soon," I said.

"OK, I will leave doors open, as I'm going to take a shower," he said.