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: Have a wonderful time. Sentence2: Also, I want a taxi to commute between the two places. Sentence3: Thai food sounds good. Could you check for a restaurant again in the centre of Cambridge? Sentence4: The address and postcode are 24 Green Street City Centre, CB23JX. Can I assist you any further today? Sentence5: yes, i'd like the phone number please. Sentence6: Thanks for the help, that is all for today. Sentence7: Sorry don't have any eastern european restaurants. Sentence8: I'm sorry, there aren't any Eastern European eateries in the centre. Can I check another part of town for you, or look for a different type of cuisine? Sentence9: What type of food are you looking for? Sentence10: The phone number is 01223354382. Can I help you with anything else today? Sentence11: Is there another price range or different cuisine you might like information on? Sentence12: I have your taxi booked. It will be a red lexus and your contact number is 07308367931. Is there anything else I may assist you with? Sentence13: I am looking for Eastern European food. Sentence14: Sure. I am looking for a restaurant near the centre of Cambridge. Sentence15: I need an expensive restaurant with Eastern European food Sentence16: I want to get picked up from the attraction by 23:45 and taken to the restaurant. Please make the taxi booking and give me the relevant info Sentence17: Thank you, that is all. Sentence18: The postcode is CB12IF and the entrance fee is unknown. Their phone number is 01223474144 if you would like to call them to find out. Sentence19: Sure, I can help you with that. Do you want to get picked up at Bangkok City or from The Man on the Moon? Sentence20: I have reservations Bangkok City restaurant but forgot to get the address and postcode. Sentence21: I found that attraction it is located at 2 norfolk street. The phone number is 01223474144. Sentence22: Yes, I'm also looking for a place called The Man on the Moon? Sentence23: Bangkok City is an expensive thai place in the centre of town, would you like more info or a booking? Sentence24: What is the postcode and entrance fee? Question: Who has spoken the sentence 21? (A) User (B) System
Answer:
Answer: (B) System