Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: Thanh Binh's phone number is 01223 362456, their postcode is C.B 3, 0 A.F Sentence2: Phone number and postcode please Sentence3: vietnamese food Sentence4: I am looking for a restaurant in the west part of town Sentence5: Thank you, goodbye. Sentence6: Thank you, good bye. Sentence7: Do you have a certain price range or food type you are looking for? Sentence8: Thanh Binh is a Vietnamese restaurant in the west of town, and is in the cheap price range. Question: Who has spoken the sentence 3? (A) User (B) System
Output:
Answer: (B) System