You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Let me give you an 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
The answer to this example can be: Answer: (A) User
Here is 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

OK. solve this:
Sentence1: Booking was successful. The table will be reserved for 15 minutes. Reference number is : LIF9IWL5 . Anything else. Sentence2: Great. I was able to book your ride for you. Your driver will be in a yellow Volvo and you can reach them at 07341534913. Sentence3: Yes, there are 3 - Fitzbillies Restaurant, The Cambridge Chop House, and Midsummer House Restaurant. My favorite is Midsummer House Restaurant - utterly decadent! May I reserve a table for you? Sentence4: Cool, thank you! I won't be needing anything else. Have a good day! Sentence5: Yes, Restaurant One Seven is located in the centre of town, as are 4 other restaurants with British food. Sentence6: It is in a moderate price range. Sentence7: Any type is fine, so please list all 44 attractions. Sentence8: Is it expensive? I'd like to really paint the town red! Sentence9: No it's free to enter, anything else? Sentence10: Just whether or not they have an entrance fee. Sentence11: Is there a restaurant in the Centre that serves British food and is in the expensive price range? Sentence12: Yeah, I'm going to be looking for some british food. Sentence13: Great, I hope you have a lovely time in town! Sentence14: There are 44 attractions in your area. Can you let me know what type of attraction you are interested in. Sentence15: Yes. Reserve a table for 1 person at 16:30 on Tuesday. Sentence16: Yes, i'm looking for places to go in the same town as the restaurant, any ideas and may I know the entrance fee, if there is one please? Sentence17: Are any of those options located in the centre of town? Sentence18: There are several restaurants close to your location, how about one called, restaurant one seven? The restaurant is located on De Vere Univeristy Arms Regent Street City Centre. Sentence19: all saints church is a great place. Would you like to know more ? Sentence20: Just a taxi to get me from the church to the restaurant by the reservation time. Question: Who has spoken the sentence 4? (A) User (B) System
Answer:
Answer: (A) User