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: Sure thing. What is your destination and when do you want to leave? Sentence2: No problem. Their number is 01223241387. Is there anything else I can help with you? Sentence3: I want to leave the restaurant by 2:00. The destination would be the camboats. Sentence4: no not at the moment. But i do need their phone number though. Sentence5: IS there a high end restaurant that serves british cuisine in the same area? Sentence6: You're all set. A blue audi is picking you up and their contact number is 07384256413. Sentence7: you are lucky! there is only one restaurant called grafton hotel restaurant that serves expensive british in the east. Do you need my help to reserve it? Sentence8: Can you also book me a taxi to commute between the two places? Sentence9: There is camboats in the east. Their phone number is 01223902112 and they are located at the plough, green end, fen ditton, post code cb58sx. Anything else? Sentence10: I'm looking for a type of boat in the east. Question: Who has spoken the sentence 5? (A) User (B) System
Output:
Answer: (B) System