Apart from experienced recruiters or HR professionals, most people receive no training for conducting interviews.
Hiring managers can often be as daunted by the interview process as an interviewee.
In this context, it pays to remind yourself; they may be nervous and that both of you can break those barriers by starting with a great conversation.
If the Interviewer is nervous throughout or at the start of the interview, help them out with the questioning by expanding on your answers, inviting conversation starters by using interesting stories, sharing experiences, and building trust.
If you can help them along and support them, who will they want on their team?