Yes, I agree with the above statement and when you smile it conveys the message to the other person that you are available to converse with him or her. Perhaps this is the best way to get away very well along with others not only in our family but in our society and places of work....
Yes. First impression is the best impression. Impression with a smile last long. hence flasing a smile at someone is the best way to start a conversation. It should be a pleasant one.