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: I was able to book you a room for 1 night at the guesthouse. The reference number is NEZYKV5E . Is there anything else I can do for you? Sentence2: The arbury lodge guesthouse is the north area with free parking and wifi. Would you care to book a room here? Sentence3: I'd like it to have free parking and free wifi. Sentence4: Alright, can you try for just one night? Sentence5: I am visiting in the northern area of town. I need to find me a place to stay for the night. Can you help? Sentence6: The Arbury Lodge is unavailable for 3 nights on Saturday. Can you select another day or for fewer days? Sentence7: No, that should do it. Thanks so much for your help! Sentence8: Have a great day! Sentence9: Is the Arbury Lodge moderately priced? If so, I would like to book a room for 1 person for 3 nights on Saturday. Sentence10: There are 11 guesthouses and 2 hotels in the north. Do you have a preference as to type or other requirements? Question: Who has spoken the sentence 6? (A) User (B) System
Output:
Answer: (A) User