You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
One 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
Solution is here: Answer: (A) User
Explanation: The sentence 1 is said by a user because the intent of it says that the information has to be gathered from the system

Now, solve this: Sentence1: what's the most expensive one? Sentence2: There are 17 Chinese places that you may like, do you have further criteria to narrow it down? Sentence3: that is it for today thank you for asking Sentence4: No, that's okay. Can I book a table for 2 on friday at 15:15? Sentence5: Do you need anything else? Sentence6: I need 2 tickets please. Sentence7: Wonderful. Is there a type of cuisine that interests you? Sentence8: the total fee is 37.76 GBP payable at the station, reference number TKP9K1U4 . Sentence9: Good morning, I am looking forward to trying some local restaurants when I arrive in Cambridge next week. Sentence10: Yes, can you check Chinese for me please? Sentence11: I'm sorry there appear to be no modern American restaurants in the area. Would you like to try something else? Sentence12: No. I would like you to pick the best one you know of. Sentence13: Booking was successful. The table will be reserved for 15 minutes.Reference number is : LZ2KI6G5 . Sentence14: How many tickets do you need? Sentence15: In that case, I would recommend the Sesame Restaurant and Bar. Would you like to know more about it? Sentence16: I would like to try some modern American food. Sentence17: Would the TR4003 train departing at 13:00 and arriving in london by 13:51 work for you? Sentence18: Thank you for your help. Sentence19: You're welcome. Have a great day. Sentence20: Thank you. I also need train information. We are planning to leave on Saturday at some time after 11:45. Sentence21: I have nine in the expensive range. Is there an area you prefer? Sentence22: Yes. That works. Question: Who has spoken the sentence 9? (A) User (B) System
Solution:
Answer: (B) System