You will be given a definition of a task first, then some input of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: Excellent. Thanks a lot. I think that's everything I need. Sentence2: South part of town. Sentence3: There are several cheap Chinese restaurants. Would you prefer any certain area of town? Sentence4: The Lucky Star restaurant is on Cambridge Leisure Park Clifton Way Cherry Hinton and can be reached by phone at 01223 244277. Sentence5: The Lucky Star is the only cheap Chinese restaurant in the south part of town. Would you like any contact information? Sentence6: I am looking for a cheap restaurant with Chinese food. Sentence7: Yes, what is their phone number and address? Sentence8: Thank you for choosing our system. Good bye Question: Who has spoken the sentence 3? (A) User (B) System
Output:
Answer: (B) System