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: Alexander bed and breakfast is is the centre location. Also a 4 star cheap guest house. How does that sound to you? Sentence2: I am showing five hotels that fit your criteria. They all offer internet and parking. Is there a specific area you want to be in? Sentence3: yes that sounds nice, can you check for booking for 5 people and 3 nights starting from monday? Sentence4: Can I get that reference number please? Sentence5: No, but the hotel should be in the type of guesthouse. Sentence6: I'm sorry, there aren't any expensive guesthouses with 4 stars, but there are 18 moderately priced 4-star guesthouses. Would that be okay? Sentence7: Goodbye. Have a great day! Sentence8: Is there one available in the cheap price range? Sentence9: I have made reservations starting monday for 3 nights and 5 people the reference number is JCCYU8ZS . Is there anything else I can help you with? Sentence10: I have 7 cheap 4 star guesthouses,can I recommend autumn house? Sentence11: please recommend another hotel in that same price range. Sentence12: Yes, I will book at autumn house for 3 night for 5 people starting Monday. Sentence13: No thank you. Good bye. Sentence14: Unfortunately the booking was unsuccessful. Would you like me to look at another hotel? Sentence15: I am looking for an expensive 4 star hotel. Sentence16: Book it please. Question: Who has spoken the sentence 5? (A) User (B) System
Output:
Answer: (B) System