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: Can I have a reference number for the restaurant? Sentence2: Can you email or fax me the information for my personal reference? Thank you for your assistance. Sentence3: for when and how many in your party please? Sentence4: Nevermind, I wrote the info down. I'll text it to everyone else, it'll be faster that way. Thanks for your help! Sentence5: The post code for Williams Art and Antiques is cb12lj. Sentence6: Do you have a price range in mind? Sentence7: Great I also need to get a taxi that can get me to the restaurant by 11:15 Sentence8: I have 4 expensive restaurants in the centre, cafe uno is a good one. Would you like me to make reservations? Sentence9: The reference number for the restaurant is MXMOHDJ7 . Sentence10: What is their postcode? Sentence11: For 7 people at 11:15 on Saturday, please. Sentence12: I know the place! It's located in the centre and it's free of charge. Sentence13: I also need a taxi. Sentence14: Booking completed! Booked car type : red volvo Contact number : 07479126194 Sentence15: Your restaurant Reference number is : MXMOHDJ7 . And your taxi contact number is 07479126194. Do you have a number I should forward this information to? Sentence16: look out for a red volvo and the contact is 07479126194 Sentence17: Glad I could help. Have a nice day! Sentence18: I would like an expensive restaurant. Sentence19: I am looking for an attraction called Williams Art and Antiques. Sentence20: Ok, that booking was successful, and the table will be reserved for 15 minutes. Sentence21: Caffe Uno will be fine. Yes, I'll need to reserve a table on Saturday. It will be at 11:15 for 7 people. Sentence22: Thank you, I am also looking for an Italian restaurant in the centre. Question: Who has spoken the sentence 19? (A) User (B) System
Solution:
Answer: (B) System