Given the task definition and input, reply with output. You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: What is the address and phone number? Sentence2: Pardon? Is that the name of a restaurant? Sentence3: Thank you goodbye. Sentence4: The address for the vietnamese restaurant Thanh Binh is 17 Magdalene Street City Centre and their phone number is 01223 362456. Sentence5: Thank you for using the Cambridge restaurant system. Goodbye. Sentence6: name is tnahh binh Sentence7: I'm looking for a cheap restaurant in the west. Sentence8: Yes, there is a Vietnamese restaurant in the west called Thanh Binh. Question: Who has spoken the sentence 3? (A) User (B) System
Answer: (B) System