What I'm trying to do:
Send a customised calendar invitation that has a bookee's response to one of the questions as the invitation title. By default, its set as the name of booking type.

Problem / limit:
The custom tags in the custom calendar invitation's event content editor only has the following tags options:
{{contact.name}}
{{contact.email}}
{{booking_type.title}}
{{booking_type.description}}
{{booking.date}}
{{booking.time}}
{{booking.starts_at}}
{{booking.timezone}}
{{booking.minutes_until}}
{{booking.hours_until}}
{{booking.meeting_url}}
{{booking.location}}
{{booking.reschedule_url}}
{{user.name}}
{{host.name}}

Looking for:
- Where can I find the tag(s) for my custom question's answers?
- Any other ways to achieve my objective?

Thank you!