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

Sentence1: How about the Gonville Hotel located in the centre area of town? Sentence2: Between $100-$300 per night. Sentence3: I have several available. What is your price range? Sentence4: Ok, I have several hotels. Any particular location? Sentence5: Location doesn't really matter as long as there's free parking available. Sentence6: What is their postcode? Sentence7: I need a place to stay with free wifi. Sentence8: Their postcode is cb11Iy, address gonville place, phone 0122336661 they have wifi and free parking too. Would you like me to book this for you? Question: Who has spoken the sentence 4? (A) User (B) System
Answer: (A) User

Sentence1: The TR3370 will take you to norwich. Do you need a ticket? Sentence2: Well I have many things to do such as architecture visits or museums or theaters. Anything sound intriguing to you? Sentence3: There are 13 to choose from. Might I suggest the Pembroke College. They have free entrance and are located on Trumpington Street. Sentence4: The number is 01223338100. Sentence5: cool, thanks dude Sentence6: The post code is cb21rf. Can I help with anything else today? Sentence7: I need a train to norwich on Sunday. Sentence8: Yes I would like to go to a college. Sentence9: Thank you! That will be all for today! Sentence10: Do you want tickets? Sentence11: yes if it leave after 19:30. thanks Sentence12: No, I don't need to book now. On the other hand, I'm looking for something to do in the centre of city. Sentence13: I am sorry that os not leaving at the correct time but I have train TR9083 leaving at 19:55. Sentence14: Can I have the postcode? Sentence15: You're welcome. Please reach out to us again, if we can be of further assistance. Good-bye. Sentence16: Yes, can I also get the phone number for Pembroke College? Question: Who has spoken the sentence 13? (A) User (B) System
Answer: (B) System

Sentence1: No that's all I needed thank you! Sentence2: I need to find the nearest hospital. Sentence3: The nearest hospital is Addenbrookes. The phone number is 01223245151. Do you need a specific department? Sentence4: You are welcome. Is there anything else I can assist you with today? Sentence5: We are happy to help. Thank you for using our service. Sentence6: No, that is it thank you! Question: Who has spoken the sentence 3? (A) User (B) System

Answer: (B) System