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: Yes if you can tell me where you will leaving from and what day and time? Sentence2: Thank you! Can you help me find a train to Norwich, please? Sentence3: Great. I'll call back if I need anything. Goodbye. Sentence4: No. I think that is all. Sentence5: It is a cheap Indian restaurant. Would you like to book a table? Sentence6: My pleasure. Have a great day. Goodbye. Sentence7: what kind of food do they serve and how expensive is it? Sentence8: I need the train to arrive by 21:00. Is there one at that time? Sentence9: I am now looking to dine at mahal of cambridge Sentence10: I am planning a trip in Cambridge Sentence11: Booking was successful, the total fee is 52.8 GBP payable at the station .Reference number is : 8L54O12B . Sentence12: No worries we are here if you need us, have a nice day. Sentence13: On what day would you like a reservation? Sentence14: I can help you find what you are looking for. Sentence15: yes book that for 3 people please Sentence16: Is there anything else I can assist you with today? Sentence17: Train 2662 leaves Cambridge at 21:36 and arrives in Norwich at 22:55. Would you like me to book a ticket for you? Sentence18: Come to think of it, I won't need a reservation. That will be all for today. Thanks for your help! Sentence19: Actually, I would like to book a table at that restaurant. Sentence20: I'll be leaving Cambridge on Monday at 9 PM. Sentence21: May I recommend the TR9246 train arriving at 20:55 Sentence22: Would you like more info or for me to book it? Question: Who has spoken the sentence 13? (A) User (B) System
Solution:
Answer: (B) System