Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: That sounds great, thank you. Goodbye. Sentence2: Great, I booked you at the Yippee Noodle Bar and your reference number is NE9Y6864 . Sentence3: You're welcome. I appreciate your using the TownInfo centre. Goodbye. Sentence4: No, I don't have a cuisine preference. I just need to book for 5 people at 19:30 on tuesday. Sentence5: I have many excellent options available. Do you have a cuisine preference, I should I recommend one? Sentence6: looking for a restaurant. The restaurant should be in the moderate price range and should be in the centre. Question: Who has spoken the sentence 5? (A) User (B) System
Output:
Answer: (B) System