For full context, see here: https://www.docdroid.net/67MgwSw/img-20170910-0001-new.pdf
the following excerpt is from the very last line: じゃ、帰りに旅行会社に寄って、調べてみます。
=> "Well, coming home I will try to research travel agency coming close/being close."
"Coming close" refers to the criteria mentioned by the partner in dialogue before (see link). However, I'm still not really wether I interpreted the context correctly. Furthermore, what irritates me is that in my interpretation, 旅行会社 is the direct object of 調べてみます. There is no を or any other particle though...