My friend was asked to go to another room when she went through immigration at the airport in London.
この場合、次のような言い方ができますよ。
ーMy friend was taken into another room.
「友人は別室に連れて行かれた」
ーMy friend was asked to go to another room when she went through immigration at the airport in London.
「友人はロンドンの空港の入国審査で別の部屋に行くよう言われた」
ご参考まで！
カナダ 
