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: I am sorry, but that hotel does not have a 4 star rating, would you like another option? Sentence2: Booking was successful for the royal standard. The table will be reserved for 15 minutes. Your reference number is : 4W94X4GE . Is there anything else I can help with? Sentence3: Yes, I am looking for a gastropub near the hotel. Sentence4: Great! I think that's all I need today. Thank you for you help! Sentence5: How about Royal Standard? It's a gastropub located at 290 Mill Road City Centre Sentence6: express by holiday inn cambridge meets your criteria. Sentence7: I've booked you a taxi from "a and b guest house" to "royal standard." The car is a blue audi and the Contact number is 07009978153. Sentence8: Thank you I also need a taxi between the two places please to get to the restaurant by 11:45 Sentence9: Great, you're booked with reference number Y5Z7GN2R . Anything else I can help you with? Sentence10: Is there a 4 star guesthouse in the east? Sentence11: Can I book one of them for 8 people for 4 nights starting tuesday and get the reference number? Sentence12: Excellent. One more thing: is that in the expensive price range? Sentence13: there are 5 four star guesthouses in the east Sentence14: Yes, royal standard is an expensive gastropub. Sentence15: Does it have 4 stars? Sentence16: Terrific. Can you book a table for the same group of people at 11:45 on the same day and provide me with the reference number? Sentence17: Thank you for using our service. Please contact us again if we can be of further assistance. Sentence18: I would like to stay at a hotel in the east, please. Question: Who has spoken the sentence 7? (A) User (B) System
Solution: Answer: (B) System