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

Now, solve this: Sentence1: I would really like to stay in the east of town, and preferably an expensive guesthouse if one is available. Sentence2: There are no expensively priced guesthouses in that area, but there are 2 moderately priced ones and 3 cheap ones. Would one of those suit you? Sentence3: I can help you find a nice place to stay. First, did you have a particular area of town you were interested in? Sentence4: Sure! Where will you be departing from? Would you like to depart at a certain time? Sentence5: I'd like to leave from Stevenage and go to Cambridge, it should arrive by 8:45 on the same day as my hotel booking. Sentence6: Booked! Reference number: WQL1WG7F . Sentence7: Thank you! I also need a train that arrives by 08:45 Sentence8: Thanks. I will definitely use your service again. Sentence9: Can you suggest one of the cheap ones? Sentence10: Yes. For one person for 5 nights starting from thursday. Sentence11: I can recommend autumn house at 710 Newmarket Rd. Would you like me to book this for you? Sentence12: You're welcome. Thank you for calling. Good bye. Sentence13: Hello, we're planning on staying in Cambridge and need lodging. We're looking for a guesthouse which has all amenities etc. Price is no problem. Sentence14: I have train TR1044 leaving stevenage at 7:54 and arriving in cambridge 8:43. Would you like me to book that? Sentence15: Thank you for using our service. Have a great day. Sentence16: You're welcome. Is there anything else I could help you with? Sentence17: No, I'm not sure I need the train yet. Thanks for the info! Sentence18: No, that's all I needed. Thanks for your time! Question: Who has spoken the sentence 13? (A) User (B) System
Solution:
Answer: (B) System