You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Your room is now booked at The Worth House and I will send you the reference number. Thank you. Good bye. Sentence2: The Worth House meets your needs. Would you like me to book a room for you there? Sentence3: I would like it to be in the north with a 4 star rating and free parking please. Sentence4: Yes, please and can you send me a reference number. Thank you. Sentence5: We have many, do you want a specific side of town? Sentence6: Can you help me find a cheap hotel? Question: Who has spoken the sentence 4? (A) User (B) System
A:
Answer: (A) User