A friendly person is not just one who treats people well, with education, who conquers people with their friendly smile, who does not choose who to say a good day to; But it is also someone who even knowing that today cannot trust everyone and not everyone will talk to her with respect, but does not differentiate anyone. In addition, a friendly person is one who can hear and understand another person's difficulties and is willing to talk or do another activity.
Based on this, we can conclude that among the options given in the question above, the appropriate line for writing a sympathy note is “I'm here if you want to talk.”