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

Sentence1: Okay. Sorry for the mix-up. Thanks for checking. Sentence2: The travel time is 105 minutes and the cost is 37.80 pounds. Sentence3: I'm looking for something in the expensive price range. Sentence4: I would like to recommend Ugly Duckling. Would you like me to make reservations for you? Sentence5: Yes, a table for 1 at 20:30. But could you check the train again? I need to leave from Liecester, not arrive there. Sentence6: No you have been a great help, thanks. Sentence7: TR6723 leaves on monday from cambridge arriving in leicester at 16:06. Would that work for you? Sentence8: Now that your reservation at Ugly Duckling is taken care of, is there anything else I can assist you with today? Sentence9: We have 77 options available. Is there a certain day you want to travel? Sentence10: I have your table for 1 booked at the Ugly Duckling, Monday at 20:30. The reference number is YDG81NJ5 . Just a moment while I check on the train. Sentence11: Yes, I'd like to leave on Monday, going to Cambridge from Leicester. Sentence12: It was a pleasure to help you. Thanks for using our service. Goodbye. Sentence13: Okay, I also need a Chinese restaurant in the centre, please. Sentence14: Could I have the travel time and price for that particular train? Sentence15: Yes I can book that for you if you would like. Sentence16: I have 10 restaurants in the centre area that have chinese. Do you have a certain price range in mind? Sentence17: Yes, that would be great. Thank you. Sentence18: I am looking for a train that leaves Cambridge going to Leicester arriving by 16:15 Question: Who has spoken the sentence 5? (A) User (B) System
Answer: (B) System

Sentence1: Booked car type : white toyota Contact number : 07264671188 All set. What else can I help with today? Sentence2: looking for places to go in town and be in the South Sentence3: Yes, please book it. Sentence4: Thank you. I'd also like to book a taxi. I need to leave the hotel by 10:15. Sentence5: When will you start your stay? Sentence6: What's the entrance fee? Sentence7: What type of attraction are you looking for? Sentence8: The attraction should be in the south. Sentence9: I think I got everything I need thanks to you! Sentence10: Unfortunately, Nusha has not provided any information on entrance fees. I can seek other options, if you'd like. Sentence11: I need it for Thursday night, for four nights, for 4 people. I'll also need a taxi by 10:15. I need the car type and contact number please. Sentence12: Booking was successful. Reference number is : Y3CFU8WN . Sentence13: There is a hotel called Cityroomz in centre located at Sleeperz Hotel, station road. Would you like me to book it for you? Sentence14: how about nusha? it's located in the south. Sentence15: then find me a particular hotel called cityroomz Sentence16: Well, you are very welcome. I hope you have a great time! Question: Who has spoken the sentence 13? (A) User (B) System
Answer: (B) System

Sentence1: You are very welcome. Have a wonderful visit! Sentence2: Okay the gonville hotel looks good, it's in the city centre. Would you like a booking? Sentence3: I need a train leaving Cambridge on Sunday. Sentence4: Goodbye and have a safe trip! Sentence5: We have quite a few options available to you, where are you heading to? Sentence6: The Gonville does include the internet. Is that alright? Sentence7: I also need a place to stay. I would like a hotel with a 3 star rating and free parking. Sentence8: No thank you. I appreciate the help today. Sentence9: I want to confirm with you that the gonville does not need to include internet. Sentence10: I have completed the booking. The total fee is 79.67 GBP and your reference number is 58YNZ8EQ . Sentence11: Goodbye! Sentence12: I'm just looking for now. Can you recommend a hotel? Sentence13: Yes, for six people, please. I will need a reference number, as well. Sentence14: Yes, can I get the address please? Sentence15: Yes, and thank you kind person for helping me! Sentence16: The address is gonville place. Can I help you with anything else? Sentence17: Shall I book you a room then? Sentence18: TR9732 departs Cambridge at 19:59 and arrives London Liverpool Street by 21:27. Would you like for me to book that? Sentence19: There are 2 expensive hotels and 3 moderate price guesthouses meeting your needs. Does the area matter to you? Or the type of lodging? Sentence20: I need to arrive by 21:30 and go to London Liverpool street. Question: Who has spoken the sentence 18? (A) User (B) System

Answer: (A) User