Can I help you ?
neutral
user
Yes , my brakes are not working well .
neutral
assistant
What's wrong with them ?
neutral
user
I hear a noise and feel vibrations when step on the brake .
neutral
assistant
The front brake ?
neutral
user
I think so .
neutral
assistant
What kind of car is it ?
neutral
user
Toyota Corolla 2002 .
neutral
assistant
Write down your name and address , give me the key , and I will check it out .
neutral
user
Do you charge for checking it out ?
neutral
assistant
No .
neutral
user
How long is it going to take ?
neutral
assistant
About half an hour .
neutral
user
I'll wait .
neutral
assistant