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

Let me give you an example: Sentence1:i need a place to dine in the center thats expensive Sentence2: I have several options for you; do you prefer African, Asian, or British food? Sentence3: Any sort of food would be fine, as long as it is a bit expensive. Could I get the phone number for your recommendation?Question: Who has spoken the sentence 2? (A) User (B) System
The answer to this example can be: Answer: (A) User
Here is why: The sentence 1 is said by a user because the intent of it says that the information has to be gathered from the system

OK. solve this:
Sentence1: Thank you and enjoy your visit. Have a great day. Sentence2: What time did you book the taxi to pick me up at the museum? Sentence3: I'll do that. Could you please tell me once more the contact number and the car type? Sentence4: Please have a nice day. Sentence5: I have you booked at charlie chan on thursday at 14:00 here is your Reference number is : E41S2AFE . Sentence6: It's address is at sidgwick avenue and it is free to enter. Would you like their phone number as well? Sentence7: I don't mind what time we leave, but I need to arrive at the restaurant by 14:00. Sentence8: The west part of town? Sure, give me more info about it? Sentence9: Can I please also book a taxi between the museum and the restaurant? Sentence10: They did not mention what time that would be, only that you'd be arriving at the restaurant by 14:00. Perhaps you can give them a ring at that contact number? Sentence11: When would you like the leave and arrive by? Sentence12: Yes, please. I need it for 8 people at 14:00 Thursday and a reference number. Sentence13: That is all. Thank you. Sentence14: There aren't any cheap Chinese restaurants nearby but there are 4 in town. Would you be interested in any of those? Sentence15: I've heard of your Museum of Classical Archaeology, and I'd like to know more about it. Sentence16: I have that booked for you at Charlie Chan's in the centre of town. Reference number E41S2AFE Sentence17: The Museum of Classical Archaeology is in the west part of town. Would you like the address or phone number? Sentence18: The car type is a black skoda and the contact number is 07389012325. Is there anything else I can do? Sentence19: I was able to book that taxi for you. Be looking for a black Skoda. Should you need to contact them, their phone number is 07389012325. Anything else? Sentence20: No, but I need a cheap chinese restaurant nearby as well. Sentence21: I'll need a taxi to commute between the two. Sentence22: Thank you once again for your help. Question: Who has spoken the sentence 17? (A) User (B) System
Answer:
Answer: (B) System