Travelling on your own you would have to pay double as cabins are sold on the basis of double occupancy.
1	Travelling	travel	VERB	VBG	VerbForm=Ger	7	advcl	7:advcl	_
2	on	on	ADP	IN	_	4	case	4:case	_
3	your	your	PRON	PRP$	Case=Gen|Person=2|Poss=Yes|PronType=Prs	4	nmod:poss	4:nmod:poss	_
4	own	own	ADJ	JJ	Degree=Pos	1	obl	1:obl:on	_
5	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	7	nsubj	7:nsubj|9:nsubj:xsubj	_
6	would	would	AUX	MD	VerbForm=Fin	7	aux	7:aux	_
7	have	have	VERB	VB	VerbForm=Inf	0	root	0:root	_
8	to	to	PART	TO	_	9	mark	9:mark	_
9	pay	pay	VERB	VB	VerbForm=Inf	7	xcomp	7:xcomp	_
10	double	double	ADJ	JJ	Degree=Pos	9	obj	9:obj	_
11	as	as	SCONJ	IN	_	14	mark	14:mark	_
12	cabins	cabin	NOUN	NNS	Number=Plur	14	nsubj:pass	14:nsubj:pass	_
13	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	14	aux:pass	14:aux:pass	_
14	sold	sell	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	9	advcl	9:advcl:as	_
15	on	on	ADP	IN	_	17	case	17:case	_
16	the	the	DET	DT	Definite=Def|PronType=Art	17	det	17:det	_
17	basis	basis	NOUN	NN	Number=Sing	14	obl	14:obl:on	_
18	of	of	ADP	IN	_	20	case	20:case	_
19	double	double	ADJ	JJ	Degree=Pos	20	amod	20:amod	_
20	occupancy	occupancy	NOUN	NN	Number=Sing	17	nmod	17:nmod:of	SpaceAfter=No
21	.	.	PUNCT	.	_	7	punct	7:punct	_
