system
Context: CHAPTER XVIII 

IN NORWAY AT LAST 

There is no denying the fact that Dave was startled. It was one thing to have Roger missing, it was quite another to have his chum gone and have the berth made up as if it had never been occupied. 

"He went to bed--I saw him go," muttered the boy from the country to himself. "Am I dreaming, or what can the matter be?" 

The more Dave thought over the affair the more was he puzzled. As quickly as he could, he put on some of his clothing and slipped on his shoes. Then he opened the stateroom door and stepped out into the passageway leading to the main saloon. 

There was a dim light burning outside, and nobody appeared to be in sight. Dave looked up and down the passageway eagerly, and even stepped to one of the corners. Then he walked to the main saloon, with its big sofas and easy-chairs, and its grand piano. Not a soul was in sight anywhere. 

"Well, if this isn't the queerest yet," he murmured, and pinched himself, to make certain that he was not dreaming. He walked to one end of the saloon and then to the other, and then started for the stairs leading out on deck. 

At that moment there came an extra-heavy gust of wind and the steamer rocked violently. Dave was thrown on his side and fell headlong over the end of a sofa. As he went down he heard several cries, one in a voice that sounded familiar to him. 
human
Who is Dave looking for?
gpt
Roger
human
Where is he?
gpt
the steamer
human
Is that a boat?
gpt
yes
human
Where is Roger?
gpt
unknown
human
Did Dave think he was in bed?
gpt
no
human
Is his bed made?
gpt
yes
human
Was Dave confused?
gpt
yes
human
Did he witness him heading to bed?
gpt
yes
human
Where did he decide to go?
gpt
the main saloon
human
Was anyone there?
gpt
no
human
What did he walk through on the way to the saloon?
gpt
the passageway
human
Was it bright?
gpt
no
human
Who was in the passageway?
gpt
nobody
human
What kind of seating choices are in the saloon?
gpt
big sofas
human
Any other options?
gpt
easy-chairs
human
Is there an instrument?
gpt
a grand piano
human
Did he check the whole saloon?
gpt
yes
human
What made the boat move?
gpt
an extra-heavy gust of wind
human
Did Dave get tossed?
gpt
yes
human
Where was he headed before the wind?
gpt
stairs leading out on deck