Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: You're welcome. Have a great day! Sentence2: Certainly, the postcode is cb12as. Is there any other information you need? Sentence3: I'm looking for an expensive restaurant for tonight in the centre of town, can you provide me with a list of my options? Sentence4: That's all that I needed thank you! Sentence5: Kymmoy is located in the centre of town. Sentence6: May I have the postcode to Kymmoy please? Question: Who has spoken the sentence 3? (A) User (B) System
Output:
Answer: (B) System