"No. As far asI can tell, I'm just a passenger. Like you," he answered. "And no one's had questions about me being here, so it must have all slotted into place when I arrived. That's what I think, anyway."
Other options:
no subject
"No. As far asI can tell, I'm just a passenger. Like you," he answered. "And no one's had questions about me being here, so it must have all slotted into place when I arrived. That's what I think, anyway."