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

[EX Q]: Sentence1: I'm going to saint johns chop house. Sentence2: What is your destination? Sentence3: The contact number is 07727071722. Is there anything else I can help you with? Sentence4: I can help you with that. When do you need to leave? Sentence5: No that is all Thank you goodbye. Sentence6: I need the contact number please. Sentence7: Your taxi is booked. Look for a yellow Volkswagen. Sentence8: Please call us anytime. Good Bye. Sentence9: I need to get a taxi out of holy trinity church. Sentence10: I need to arrive at the chop house by 22:30. Question: Who has spoken the sentence 2? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: The postcode is CB58BS. Can I help you find anything else? Sentence2: Can you tell me what their star rating is? Sentence3: I need something in the south and free parking. Sentence4: I will be in the centre of cambridge. I am looking for any type of attraction involving architecture. Sentence5: You're very welcome, I'm glad that I could help. I hope that you enjoy your stay! Goodbye. Sentence6: Of course! They are a 3-star establishment. Would you like me to go ahead and book that for you? Sentence7: thats it, thanks! Sentence8: Bridge Guest House was available for 2 nights. Your reference number is ULWMFZAX . What else can I do for you today? Sentence9: I'm sorry. There is no availability. Would you like to try different dates or another hotel? Sentence10: I'd recommend All Saints Church on Jesus Lane. Did you need help with anything else? Sentence11: I would recommend the Bridge Guest House based on your criteria. Would you like me to book you a room? Sentence12: There are 33 places to stay, do you have any requirements? Sentence13: How about just 2 nights instead? Sentence14: yes, 7 people 4 nights starting Wednesday. Sentence15: I need a place to stay. Sentence16: Can you give me the postcode for that? Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: There are two guesthouses in the centre. I recommend el shaddai Sentence2: Ok, I also need a taxi to arrive at the restaurant by 17:30. Sentence3: La raza is a cheap restaurant that serves spanish food. Would you like their phone number? Sentence4: Is that located in the centre? Sentence5: Your booking was successful! Your reference number is OSNXB1IR . Is there anything else I can help you with today? Sentence6: Yes. Friday. 2 people. 17:30. Sentence7: The Alexander Bed and Breakfast has internet and the phone number is 01223525725. Sentence8: It is indeed in the city centre. Would you like me to make reservations for you? Sentence9: for 2 on friday Sentence10: alright, then what is your destination please Sentence11: Hello I am looking for a good, cheap, Spanish restaurant.Is there any that you can recommend? Sentence12: What car will be picking me up? Sentence13: Do they have internet and what is the phone number? Sentence14: Thank you for contacting us. Have a great trip. Goodbye. Sentence15: Does the Alexander Bed and Breakfast also have free parking? Sentence16: No problem. Where are you departing from? Sentence17: A grey honda is booked. You can call 07936397340 to reach them. Sentence18: I will be departing from the restaurant. Sentence19: Thanks for all the bookings. I'm ready for my visit now. Take care. Goodbye. Sentence20: Yes they have free parking and wifi. Sentence21: I have made your reservation at La Raza for 17:30 on Friday. Your table will be held for 15 minutes. Your reference number is OS5VNH62 . Do you need anything else? Sentence22: I guess I need to book the hotel first. Is there a guesthouse in the same area as La Raza? Sentence23: Please go ahead and book the Alexander Bed and Breakfast for me. Sentence24: I will book but I need to know how many people and for what day? Question: Who has spoken the sentence 17? (A) User (B) System
[EX A]:
Answer: (B) System