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

Example Input: Sentence1: I have your taxi booked. Look for a blue volkswagen, contact number 07655267463. Is there anything else I can help you with? Sentence2: I need to book a place to stay with a star of 4. I don't need free parking. Sentence3: Can you please provide me with the address, telephone number and the cost of admission. Sentence4: Thank you. Enjoy your stay Sentence5: I now need a taxi to get to the church from the hotel. I would like to leave the hotel by 15:45. Can you book that for me? Sentence6: I don't care about location, just would like a moderate price with 4 stars please. Sentence7: We have 44 attractions in the centre of town Broughton House Gallery is a museum we have available. Sentence8: We have 11 in the moderate range. They are all a guesthouse accommodation. Would you like one of these? Sentence9: I need one with free wi-fi. Sentence10: I have you booked. The reference number is WPGQ4ADJ . Sentence11: After that I'm also going to need the reference number. Sentence12: OK, now can you tell me about some of the attractions in the center of town? Sentence13: I would also need to book it for 4 nights. Sentence14: No, that is all. Thanks so much. Bye. Sentence15: One person, and I'd like to arrive on Tuesday. Sentence16: We have over 20 fine hotels. Do you have any preferences of cost or location? Sentence17: How long do you want to stay? Sentence18: Can i book one on tuesday? Sentence19: OK, let me see what I can do. Sentence20: How about All Saint's Church at 01223452587 in the centre? It's free. Sentence21: before I look for that, could you let me know how many people are staying and what day you'd like to arrive? Sentence22: I have two: a and b guesthouse in the east and avalon in the north. Would one of these work for you? Question: Who has spoken the sentence 18? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: I have two restaurants that meet your needs, Graffiti and Travellers Rest. Would you like to make a reservation at one of those? Sentence2: Yes, I need to book a table for five people at 17:15 for this Thursday. Sentence3: Thank you so much. Have a nice day. Bye. Sentence4: A reservation at 16:15 was successful at Graffiti. Your reference number is VCCP7L4M . Is there anything else I can help you with today? Sentence5: You're welcome, have a good meal. Sentence6: Will you check 16:15? Sentence7: Are there any expensive British restaurants in town? Sentence8: There are 57 restaurants that match your specifications. Do you want anything more specific? Sentence9: Yes, I'd like to find one in the west side of town. Sentence10: I am unable to book a restaurant at that time on Thursday. Is there another day or time slot I can check for you? Question: Who has spoken the sentence 5? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Whale of a Time is a nice place they are in the west. Sentence2: Fantastic! Your reservation went through smoothly. Here is your reference number JJWEO8ZH . They will keep the table reserved for 15 minutes for you. Can I help with anything else? Sentence3: Sala Thong is the only Thai restaurant in the west. It's expensive, but worth it. Would you like a reservation? Sentence4: Yes, there is a table open for 12:30 on Tuesday. Would you like me to book it for you? Sentence5: Can you try an entertainment attraction instead? Thanks. Sentence6: That sounds great, what is the postcode? Sentence7: i am looking for a place to dine. The restaurant should be in the west and should serve thai food. Sentence8: I'm sorry. There are no swimming pools in the west part of town. Would you like to try a different area or attraction type? Sentence9: Whale of a time has a postcode of cb238el. Is there anything else I can help you with today? Sentence10: Yes, please. I would like a reservation for 2 at 19:00 on Tuesday. Please provide a reference number. Sentence11: No, I think that is all I need today. Thank you for your help. Sentence12: And thank you for calling in, please take care and call if you need anything else. Sentence13: Yes. Please book a table for two. Sentence14: Gosh, I'm so sorry! I don't want the reservation for the evening, I want Thai food for lunch. Do you have a table for 2 at 12:30 on Tuesday? Sentence15: Thanks! Could you help me find a swimmingpool please that is also in the west? Sentence16: Great News booking was successful they will hold the table for 15 mins and your reference number is JJWEO8ZH . Is there anything else i can help you with? Question: Who has spoken the sentence 5? (A) User (B) System
Example Output:
Answer: (B) System