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 also want a taxi to commute between the two places Sentence2: That's it for now. Thank you for you patient help. Goodbye. Sentence3: book a hotel for 7 people and 2 nights starting from wednesday Sentence4: I have 24 options available. Do you have a specific area in mind? Sentence5: It will be picking me up from the hotel. I'll need the contact number and car type, please? Sentence6: First let's pick one of the 14 guesthouses and then I'll book your room! Sentence7: Absolutely! Your Booking was successful. Reference number is : 7ZCFV2O4 . Is there anything else you need? Sentence8: I need a guesthouse to stay while I'm in town. I don't care if it has free parking or not. Do you have something I could get? Sentence9: We have five parks available. Do you have an area that you would prefer? Sentence10: Yes, I would recommend acorn guest house. Sentence11: I should be able to help you with that. Are you traveling to the Botanic Gardens or from? And what time do you want the taxi for? Sentence12: I'd like someplace in the center, please. Sentence13: There are 14 guest house with internet and moderate price what area would you like Sentence14: Sounds good. There are a lot to chose from, is there one that you specifically recommend? Sentence15: And where would you like the taxi to pick you up? Sentence16: That sounds fine can you book for seven people for two nights starting Wednesday? I'm also looking for a park to visit. Sentence17: You are booked for a white audi with the contact number 07387814664. May I help with anything else, like a restaurant? Sentence18: Yeah, any time I was happy to help. Sentence19: I'm also looking for a park to go to while I'm in town. Sentence20: i want to leave the hotel by 01:15 Sentence21: The Cambridge University Botanic Gardens is located in the centre. It's on Bateman Street. The entrance fee is 4 pounds. Can I help you with something else? Sentence22: No specific area but i do need wifi and a moderate priced guesthouse please. Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Kymmoy is in the centre of town and the phone number is 01223 311911. May I help you with anything else? Sentence2: Thank you, I have all I need. Goodbye! Sentence3: What is the phone number and area? Sentence4: Is there any expensive restaurants in town serving Australian food? Sentence5: You're welcome. Thanks for your call! Goodbye. Sentence6: Kymmoy is an expensive asian oriental restraunt in town. Sentence7: I'm sorry, there are no Australian restaurants. Would you like another type of food? Sentence8: How about asian oriental food? Question: Who has spoken the sentence 2? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Booking was successful. Reference number is : KZHALMQD . anything else? Sentence2: Yes, please. Can we get a table on the same day we arrive at the hotel? We'd like to eat at 20:00, if possible. Sentence3: I need a hotel in north Cambridge. Sentence4: Is the parking free? Sentence5: Yes, go ahead. I need it for Tuesday for 3 people and for 3 nights. Could you send me a reference number too? Sentence6: Perfect, thank you. That's all I needed. Sentence7: Your table has been booked for 3 people at 20:00 on Tuesday at Graffiti. Your reference number is BA1VAKNA . Sentence8: There are many good British restaurants in town. One of my favorites is Graffiti on the west side of town. Would you like me to make you reservations? Sentence9: Yes they have free parking. Sentence10: Can you also find an expensive british restaurant for me? Sentence11: There are 2 hotels in the north area of town, both have 2 star ratings and offer free wifi and parking. Can I book one for you? Sentence12: I told you Tuesday can I speak to a manager you are not paying attention. Sentence13: Excellent! Enjoy your visit. Sentence14: What day will you be staying there? Question: Who has spoken the sentence 6? (A) User (B) System
[EX A]:
Answer: (A) User