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

Ex Input:
Sentence1: Then you are all set? Sentence2: I booked you a black volvo. The driver can be reached at 07410117478. Is there anything else I can help you with today? Sentence3: I'm sorry, I clearly wasn't paying attention. Yes that is all I need. Sentence4: Booking was successful. The table will be reserved for 15 minutes. Reference number is : 0IJIWWQ9 . What else can I help you with? Sentence5: We have five hotels that meet that criteria, are you looking for a specific part of town? Sentence6: Yes. Have a great day. Sentence7: Anything in the centre would be fine, whatever you recommend. Sentence8: Regretfully, I don't have a listing for Venetian cuisine. Do you have a second choice? Sentence9: I'm looking for a place that has 3 stars and free parking. Sentence10: There are over a hundred restaurants to chose from do you have a price range? Sentence11: Does that one have free internet as well? If so it will work great for me. Sentence12: Yes I can. What type of place to stay would you like? What area of town? Sentence13: Yes the hamilton lodge is 3 stars moderately priced and offers free wifi and parking. Sentence14: There are 4 results. restaurant one seven, the oak bistro, the copper kettle, and cotto. Would you like more information on any of those? Sentence15: Sadly, I don't have access to that information. The Oak Bistro might be a good choice. Their phone number is 01223323361 if you'd like to call them Sentence16: Thanks, I need a taxi to commute between the two places. Sentence17: I am not looking for a specific area, but I would like for it to be in the moderate price range, please. Sentence18: Definitely something moderately priced. If you can't find Venetian, how about British? Sentence19: Thank you for calling. Sentence20: I'm looking for a restaurant that serves venetian food. Sentence21: Yes, please. Find out which of the four restaurants have vegan options, please? Sentence22: How about the hamilton lodge it's located in the north. Sentence23: I am traveling between the two places discussed, I need to reach the restaurant by the booked time. Sentence24: I can help you book a taxi but first I need some information - where are you leaving from and what's the destination. Also what time do you want to leave? Sentence25: I also need a place to stay. Can you help with that? Sentence26: Okay, well, let's go ahead and book a table for one at 11:30 on Tuesday. Question: Who has spoken the sentence 18? (A) User (B) System

Ex Output:
Answer: (A) User

Ex Input:
Sentence1: Don't worry, I should be able to help you. Do you know which station you'll be leaving from or going to? Sentence2: What is your destination? Sentence3: Hi, I am trying to plan a trip and need some help with a train. I'm not familiar with trains at all unfortunately. Sentence4: I'm departing from leicester and I need to leave on friday. Thank you for helping! Sentence5: I also need a place to stay. Sentence6: 11 pm and I want it for three people Sentence7: I'm going to Cambridge. Sentence8: We have many great places to stay. What area would you like and do you have a price range? Sentence9: Is there a time you would like to arrive by? Sentence10: TR6539 will arrive by 22:54. Booking was successful, the total fee is 113.4 GBP payable at the station. Your reference number is IE5RK2IG . Do you need anything else? Question: Who has spoken the sentence 2? (A) User (B) System

Ex Output:
Answer: (A) User

Ex Input:
Sentence1: The one in the south is considered cheap Sentence2: it is in cheap price range Sentence3: No that's all I need today. Sentence4: I was able to make a booking for you. Your reference number is J7NF1FG6 . Sentence5: Nandos serves Portuguese food. There's one in South Cambridge and one in the central area. Would you like me to make a reservation for you? Sentence6: Have a great day Sentence7: I don't have any 0 star hotels with parking available but I do have a couple of guesthouses available. Do you have a location preference? Sentence8: Is there anything else I can help with today? Sentence9: What about a moderately priced 4 star hotel with free parking? Sentence10: ok I need a place to eat that serves portuguese food Sentence11: Ok great. Thanks for the help. Sentence12: I can make a reservation for Nandos in the south. How many in your party, what day and what time do you want? Sentence13: So this is probably impossible but can you find me a 0-star hotel that offers free parking? Sentence14: No, just tell me what kind of prices the one in the south charges. Sentence15: Well, I have the Archway House that would fit your needs. It's located in the North at 52 Gilbert Rd. Can I book this for you? Sentence16: Unfortunately there are no moderately priced 4 star hotels with free parking. Could I interest you in either a 2 star moderately priced hotel, or 4 star guest house? Sentence17: No, but I would like place in the moderate price range. Sentence18: Okay, great. I'll go there. Sentence19: Thanks, but I don't need a reservation. Can you tell me their price range please? Sentence20: I think I'll go with my original 0 star. Archway House sounds fine. Can you reserve 3 nights arriving on Thursday for 3 people please? Question: Who has spoken the sentence 10? (A) User (B) System

Ex Output:
Answer: (A) User