The context of the following conversation is After receiving a phone call, Tracy quickly rushed home.:
Tracy says I'm sorry that I had to run away so fast..
The friend responds Don't worry about it,  it's all right..
Tracy responds I knew you would understand because you're a great friend..
The friend responds We all have had emergency calls that we needed to take care of right away..
Tracy responds That's true, but some people still don't understand..
The friend responds Those people are friends..