
Try making a comment or asking a question - it shows the other person you're interested in what they are saying.
Here are some examples of what you can say:
Making Comments
"No!" - to show surprise.
"I don't believe it!" - to show surprise.
"Wow!" - to show admiration or surprise.
"That's incredible / amazing / unbelievable" - to show great interest in the subject of conversation.
"How awful / terrible" - to show sympathy with someone else's bad news.
Asking Questions
"Really?" - to show surprise.
"And you?" - when someone asks you how you are.
"Did you?" - can be used to encourage someone to tell their story.
For example, "I saw her last night", "Did you?" "Yes, she was with one of her friends, and she…."