In which part of an interview would you have informal conversation to build rapport?

 Building rapport with your interviewer can often give you the edge when compared to other candidates with similar skills and experience.

The beggininng then you have to Remember to:Smile when you first see your interviewer.Establish and maintain eye contact.Be the first to say hello and extend your hand.Deliver a sincere greeting.Use the person's name.Do more listening than talking