You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

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: Answer: (A) User
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

New input: Sentence1: I ahve two places, Chines and Portuguese, which would you prefer? Sentence2: Hi, I'm looking for a cheap restaurant in the south. What do you have? Sentence3: Booking was successful. The table will be reserved for 15 minutes. Reference number is : VMFXYH18 . Sentence4: Any other hotels? Sentence5: i am also looking for a hotel that includes free wifi. Sentence6: I would like to book a room for 5 nights for 5 people starting the same day. Sentence7: I'm sorry I was unable to book that. Would you like to try another venue? Sentence8: I would like to book for the lensfield hotel for 5 people from the same day but for 3 nights only then. Sentence9: Yes. Can you book me a take for 5 at 18:00 on monday? Sentence10: I only see the lensfield hotel, maybe we can try with other dates? Sentence11: That would be The Lucky Star located at Cambridge Leisure Park, Clifton Way, Cherry Hinton. Can I book a table for you? Sentence12: That's all I need. Thank you for your help! Sentence13: I definitely want a hotel, not a guest house. It should also be in the same area as the The Lucky Star restaurant. Sentence14: Booking for 3 nights was a success! Your reference number is ZE9TPUSJ . Is there anything else I can help you with today? Sentence15: There are many hotels and guest houses. Do you preder a certain location and price range? Sentence16: It was a pleasure to help. Thanks for using our service. Have a great night. Goodbye. Sentence17: The Lensfield Hotel is in the south and falls in the expensive price range. They're a 3 star establishment with free wifi and parking. Care to book a room? Sentence18: Chinese would be great. Sentence19: Can we try 17:00? Sentence20: Unfortunately, I was not able to book it for monday. Did you have another day in mind? Question: Who has spoken the sentence 18? (A) User (B) System
Solution:
Answer: (A) User