You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: is there anything further I can help you with? Sentence2: I'm interested in find a place to see in the centre of the town. Sentence3: Yes, could I have that train ID please? Sentence4: i also need a train that departs from london liverpool street Sentence5: No that is all I needed. Thank you. Sentence6: What day and time would you like to depart? Sentence7: No thank you. I have everything I need for now. Sentence8: Certainly. The train id is TR8530. Would you like to book at ticket? Sentence9: You can depart from London Liverpool street to Cambridge on Saturday at 17:39 for 13.28 pounds. The trip will take 88 minutes. Did you have any further questions? Sentence10: I recommend castle galleries located at unit su43, grande arcade, saint andrews street. Their phone number is 01223307402. Is there anything else? Sentence11: I'd like to leave on saturday after 17:15. Sentence12: Not really. What's the address and phone number for your favorite attraction? Sentence13: We have lots to see! Anything specific you had in mind? Sentence14: thank you and enjoy your stay in cambridge! Question: Who has spoken the sentence 5? (A) User (B) System
Answer: (B) System