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 am also looking for something to do in town. Are there any facilities for multiple sports on the west side? Sentence2: I recommend Kettle's Yard on Castle Street. It is actually free! Sentence3: Can you please recommend a museum and give me their address? Sentence4: Glad I could be of assistance. Please let me know if I can be of any further assistance. Sentence5: I'm looking for a train that leaves on Thursday to go to Cambridge. Sentence6: Do you have a time that you want to arrive by? Sentence7: Where are you departing from? Sentence8: I am departing from Peterborough and leaving after 14:15. Sentence9: Thank you very much, I appreciate your help. Good Bye. Sentence10: no. book for 2 people and give me the reference number. Sentence11: I'm sorry, there are no multiple sports attractions on the west side of the city. Is there a different type of attraction or a different area you'd like to try? Sentence12: TR0904 has been booked for 2 people on thursday at 14:48, cost is 33 GBP and reference number is U120DUFH . Is there anything else I can help you with today? Question: Who has spoken the sentence 5? (A) User (B) System
Output:
Answer: (B) System