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

Sentence1: Yes, I can! When and what time would you like to go? Also how many people is the reservation for? Sentence2: The address for Christ's College is Saint Andrew's Street. Sentence3: Great. Thank you for your help. Sentence4: Thank you. Will the taxi arrive at the restaurant by 16:00? Sentence5: Is there an entrance fee for the college? Sentence6: It has been booked the reference number is E8J6X7ZH the table will be reserved for 15 minutes. Sentence7: I've booked your taxi! A Grey Volkswagen will you pick you up and take you to the restaurant. The contact number is 07776457787. Can I help you with anything else? Sentence8: Yes, the taxi is due to arrive at 16:00. Sentence9: There are 13 colleges to visit in the centre. Are you interested in visiting christs college? Sentence10: I need to book a table for 7 people at 16:00 on Tuesday. Sentence11: Great. I'm looking for Midsummer House Restaurant also. Can you help me book it? Sentence12: There is no entrance fee for Christ's College. Sentence13: It's my pleasure. Let me know if you ever need anything else. Sentence14: Sounds great. What is the address? Sentence15: Hi! Can you tell me a little bit about the colleges that are in the center of town? Sentence16: I also need a taxi between both places to arrive by the booked time Question: Who has spoken the sentence 10? (A) User (B) System
Answer: (A) User

Sentence1: Would you prefer Indian food or Italian food? Sentence2: Curry Prince is a moderately priced restaurant in the east part of town that serves Indian food. Would you like the phone number? Sentence3: I want a moderately priced restaurant in the east part of town. What is the phone number? Sentence4: You're welcome, goodbye. Sentence5: Awesome, thank you! Goodbye! Sentence6: The phone number for Curry Prince is 01223 566388. Sentence7: I don't care. Give me their phone number. Sentence8: Yes give me the phone number. Question: Who has spoken the sentence 7? (A) User (B) System
Answer: (B) System

Sentence1: The entries have now been narrowed down to 38. Where will you be departing and at what time do you want to leave? Sentence2: There are four theatres in the centre that you could visit. Sentence3: There are many! What day will you be traveling? Sentence4: And, what is the postcode and entrance fee, please? Sentence5: I would like to find a train leaving from Peterborough. Sentence6: Two people going to cambridge. We'd like to arrive by 12:45. Please book 2 seats and give the refernce number. Sentence7: I will be leaving on Friday. Sentence8: TR6691 leaves peterborough at 11:48 and arrives in cambridge at 12:38. Your total for 2 ticketsis 33GBP, payable at the station, and the confirmation is 5W98EJ2Y . Is there anything else? Sentence9: Which one would you recommend? Sentence10: Okay would you like a specific area? Sentence11: Sure- what is the entrance fee, phone number, and postcode? Sentence12: Please let us know if there is any way we can help you in the future. Have a great day. Goodbye! Sentence13: Actually, I could use some help finding a theatre to visit in town while I am there. Sentence14: Okay thank you, thats all i need for now. Sentence15: Yes, I'd like a place in the center of town, please. Sentence16: I'm sorry, the postcode is cb23qe, but the entrance fee is not listed online. You would have to call them at 01223357851. Sentence17: the cambridge corn exchange is one of our most popular theatre. Would you like any more information? Sentence18: The phone number is 01223357851. Question: Who has spoken the sentence 15? (A) User (B) System

Answer: (B) System