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: It really needs to be 19:00 for 3 people on Tuesday at La Raza. Can you try again please? Sentence2: Can I please have the exact address location? Sentence3: I can recommend the Cambridge University Botanic Gardens, it's both peaceful and interesting. The entrance fee is 4 pounds. Does that sound like what you're looking for? Sentence4: I am happy to have been of assistance. Have a great day. Goodbye. Sentence5: There are many things to do in the centre is there a type of attraction you are looking for? Sentence6: No, I just need the reservation for that time and place. Sentence7: That sounds wonderful, what is the address on that? Sentence8: Yes, please. Sentence9: And where are you leaving from? Sentence10: I was able to book that taxi for you. Be looking for a red Ford. If you need to reach them, their phone number is 07033355721. Anything else for today? Sentence11: Yes, thanks! I also need a table at La Raza, please. Tuesday, 3 people, at 19:00. Sentence12: Sorry, that was also unsuccessful. Sentence13: La Raza is completely booked at that time, I apologize for the inconvenience. Would you like to try an earlier reservation? Sentence14: Okay. Thank you very much. Sentence15: Okay, well, I'll take my chances on availability when I get there. I also need a taxi to get to the restaurant by 19:00. Sentence16: The Botanic Gardens are located on bateman street. Is there anything else I can help you with today? Sentence17: Is there another time you'd like to try, it is not avaialble. Sentence18: How about 18:00? Sentence19: I am looking for attractions in the centre. Sentence20: Yes, 3 people at 19:00 on Tuesday. If that doesn't work, I'll just call and book it myself. Sentence21: Really? Can you try one more time? I really wanted La Raza on Tuesday for 3 people at 19:00. Sentence22: I'm sorry that time is not good either, are you positive you need it for 3 on Tuesday? Sentence23: Did you want to try earlier? Sentence24: Any place would be great. Sentence25: The Botanic Garden at Cambridge University Sentence26: Cambridge University Botanic Gardens is located on bateman street. Does this help? Sentence27: I was unable to book that time. Would you like to try another time? Sentence28: Unfortunately they are booked at this time. Can I possibly try a little bit earlier or later for you? Question: Who has spoken the sentence 27? (A) User (B) System
Answer:
Answer: (B) System