You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
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
Example solution: Answer: (A) User
Example 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

Problem: Sentence1: Yes, that does sound good. Can you book a room for 7 people for me for 3 nights starting from Sunday? Sentence2: Booking was successful. Reference number is : 40N5I5FN . anything else i could help you with? Sentence3: The location doesn't matter. I just need a Chinese restaurant that is moderately priced. Thanks. Sentence4: No particular area but it should have free parking too. Sentence5: Hi, I'm looking for a 4 star place that offers free wifi. Sentence6: That is all for today. Thanks for all your help. Have a great day! Sentence7: There are 21 hotels that meet the description. Are you looking for one in a particular area? Sentence8: thank you and enjoy your stay in our lovely city! Sentence9: There are some excellent chinese restaurants in that price range. Do you have a location preference? Sentence10: Booking was successful. The table will be reserved for 15 minutes. Reference number is : RQHOVD73 . Is there anything else I can assist you with? Sentence11: great, thanks. I need also a chinese restaurant in moderate price range? Sentence12: Okay. I would recommend Archway House, which is at 52 Gilbert Road and has everything you're looking for. Does that sound good? Sentence13: The Jinling Noodle Bar meets your criteria, should I book it for you? Sentence14: Please do. I want it for 7 people on sunday at 16:00. Please provide the reference number Question: Who has spoken the sentence 4? (A) User (B) System
Solution: Answer: (A) User