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: In what section of town are you looking to stay? I have 8 different lodgings that fit your requirements. Sentence2: I am not really picky. Sentence3: I would like the arbury lodge guesthouse Sentence4: Are either of those in the cheap price range? Sentence5: Great, thank you for using Cambridge TownInfo centre. Goodbye! Sentence6: I'm sorry. Alexander bed and breakfast is fully booked. Do you want to book starting another day or for a shorter stay? Sentence7: That sounds good, yes. I need 4 nights booked for me, beginning Friday and for 7 people. Sentence8: No, I've got everything I need. I appreciate your help. Sentence9: No, but the alexander bed and breakfast is in the cheap range and has wifi. It's in the centre of town. Would you like me to reserve a room for you? Sentence10: Yes, 3 nights please and can I have a reference number Sentence11: I've booked that reservation. The reference number is 1G6A07OI . Can I assist with something else? Sentence12: I am looking for a place to stay. The hotel should have a star of 4 and should include free wifi Sentence13: Try the a and b guest house or arbury lodge guesthouse Sentence14: Is it cheap? Question: Who has spoken the sentence 5? (A) User (B) System
Output:
Answer: (B) System