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: Yes, the price is 37.80 pounds. Would you like me to book it for you? Sentence2: There are 13 results. Is there a certain time you'd like to leave by? Sentence3: The address is 151 Hills Road. Is there anything else you'd like to know? Sentence4: Ok, thank you for calling and feel free to call again if you should need anything further. Sentence5: Can you help me find a train leaving leicester goig to cambridge? Sentence6: No, thanks. I'm looking for info on a bridge guest house. Sentence7: Nothing more, thank you. That's all I need for today. Sentence8: No, i don't need a booking yet. I just would like the address please. Sentence9: I need to travel on Friday and arrive by 19:45. Sentence10: No, I said I need to arrive by 19:45 already. Sentence11: 18:54 is the latest on tr5154 shall i book it ? Sentence12: Of course! What day will you be traveling? Sentence13: It's a moderately priced 3 star guesthouse in the south. Would you like a room? Sentence14: Could you let me know the cost? Question: Who has spoken the sentence 5? (A) User (B) System
Output:
Answer: (B) System