One should always try to provide a sense of reassurance to that person. Ask them how they are, what you could do to help them, what is it that they need right now? Always ask, listen and try to not assume and suggest. Let them know you are there if they need to reach out to you.

• ‘Do you want to talk about it?’
• ‘What might help you feel better?’ 
• ‘You’ll get through this. I shall be there with you.’
• ‘You’re strong. Even if you don’t feel that way right now.’