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: Thanh binh is a vietnamese restaurant in the west part of town. Would you like their location? Sentence2: Thank you! Sentence3: I am looking for a restaurant that serves Vietnamese food. I don't care about the price range. Sentence4: its address is 17 Magdalene Street City Centre and the phone number is 01223 362456 . Sentence5: Thank you, goodbye. Sentence6: Yes, what is their address and phone number? Question: Who has spoken the sentence 5? (A) User (B) System
Output:
Answer: (B) System