Tom:Hi,Jack.

Jack:Oh,Tom,Nice to meet you!

Tom:Nice to meet you,too.This is my sister,Lily.

Jack:Oh,hello!I'm afraid we have seen each other before,do you remember me?

Lily:Hr,I'm afraid I forget it.I'm sorry,but when was that happened?

Jack:About a summer six years ago.We both studyed in a piano trainning.I remember you played piano very well.

Lily:Oh,I think about it.You are that hummor brother.Glad to see you again.

Tom:So you two knew each other before.It's so good.

Jack:I really don't know that you two are sister and brother.

Lily:So let's celebrate that we meet again.

Jack:Good idea.

Tom:Ok,let's go.