I asked Messenger of Allah ﷺ about a virgin whose marriage is solemnised by her guardian, whether it was necessary or not to consult her. Allah's Messerger ﷺ said: Yes, she must be consulted. 'A'isha reported: I told him that she feels shy, whereupon Messenger of Allah ﷺ said: Her silence implies her consent.  

سَمِعْتُ عَائِشَةَ تَقُولُ سَأَلْتُ رَسُولَ اللَّهِ ﷺ عَنِ الْجَارِيَةِ يُنْكِحُهَا أَهْلُهَا أَتُسْتَأْمَرُ أَمْ لاَ فَقَالَ لَهَا رَسُولُ اللَّهِ ﷺ نَعَمْ تُسْتَأْمَرُ فَقَالَتْ عَائِشَةُ فَقُلْتُ لَهُ فَإِنَّهَا تَسْتَحْيِي فَقَالَ رَسُولُ اللَّهِ ﷺ فَذَلِكَ إِذْنُهَا إِذَا هِيَ سَكَتَتْ  

[Machine] "I asked the Messenger of Allah ﷺ about the young girl if her family can arrange her marriage or not. The Messenger of Allah ﷺ said to her, 'Yes, she can be arranged for marriage.' Aisha said, 'But she feels shy and remains silent.' The Messenger of Allah ﷺ said, 'That is her approval if she keeps silent.'"  

ؓ تَقُولُ سَأَلْتُ رَسُولَ اللهِ ﷺ عَنِ الْجَارِيَةِ يُنْكِحُهَا أَهْلُهَا أَتُسْتَأْمَرُ أَمْ لَا؟ فَقَالَ لَهَا رَسُولُ اللهِ ﷺ نَعَمْ تُسْتَأْمَرُ قَالَتْ عَائِشَةُ فَإِنَّهَا تَسْتَحِي فَتَسْكُتُ قَالَ رَسُولُ اللهِ ﷺ ذَاكَ إِذْنُهَا إِذَا سَكَتَتْ