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

Ex Input:
Sentence1: I need to find a hospital nearby that has a hepatobillary and gastrointestinal surgery referral center Sentence2: No, that's it. Thanks! Sentence3: No, I just need the postcode. Sentence4: You're very welcome. Have a great day! Sentence5: Certainly. The postcode is CB20QQ. Anything else I can help you with today? Sentence6: Addenbrookes Hospital located at Hills Rd, Cambridge has that department. Would you like the phone number to that direct department? Question: Who has spoken the sentence 5? (A) User (B) System

Ex Output:
Answer: (B) System


Ex Input:
Sentence1: Great I also need a taxi to take me between the two places and get me to the restaurant by 20:00 Sentence2: You are most welcome. May I help you with anything else, such as attractions? Sentence3: The University Arms is a 4 star hotel on Regent Street. Would you like me to make a reservation there? Sentence4: Booking was successful. Reference number is : VJQM2DFY . Anything else I can do for you? Sentence5: Is that in the centre area also, and in the expensive price range? That is what I'm looking for. Sentence6: In the centre, please Sentence7: Perfect!. Thank you for your help! Sentence8: Great, can you book for 1 person and 4 nights starting Wednesday. Sentence9: Have a great day! Sentence10: Yes, University Arms Hotel is a 4-star hotel in the expensive price range. Would you like to make a reservation? Sentence11: There are 33 expensive restaurants in the centre of town. Is there a specific type of cuisine you were looking for? Sentence12: Sure, which part of town did you want to eat in? Sentence13: Booking for the taxi complete look for a grey bmw car contact number is 07434690950 to arrive at the restaurant by 20:00 Sentence14: You have been booked at the Bedouin on Wednesday at 20:00 for 1 person. Your reference number is 29KJKZOD . Is there anything else I can help you with? Sentence15: I'm visiting the centre and want to go all out on the experience. Can you help me find an expensive restaurant? Sentence16: I need a place to stay. Sentence17: no, just surprise me. I need a reservation for 1 person at 20:00 on wednesday. Sentence18: No thanks, that's all I needed. Question: Who has spoken the sentence 15? (A) User (B) System

Ex Output:
Answer: (B) System


Ex Input:
Sentence1: I'm afraid I couldn't get you that booking. Would you like me to try another place or a shorter stay? Sentence2: I'm afraid that booking was also unsuccessful. Would you like to try a shorter stay or another hotel or guesthouse? Sentence3: Yes can I get the postcode, and it's a concerthall you said? Sentence4: I was successful in booking 1 night at alexander bed and breakfast on tuesday for 6 people. your reference number is R6FET1MJ . Can I help with anything else? Sentence5: I'm pleased I could assist you. Sentence6: Alexander B & B has both free wifi and parking. It also has 4 stars! Would you like to make a booking there? Sentence7: Hi, i want to find out about the man on the moon attraction please. Sentence8: Yes, please. For 6 people for 3 nights starting on tuesday Sentence9: Excellent, I also need a cheap guesthouse, please. Sentence10: Yes it is a concert hall and the postcode is cb12lf. Sentence11: Alexander bed and breakfast is in the cheap price range in the centre of town. Sentence12: Please try for one night. Sentence13: I need free parking and wifi. Sentence14: How about for 2 nights instead? Sentence15: No that was it. Thank you so much for your help. Sentence16: the man on the moon is a concerthall found in the center of town. Do you need their address and contact details? Question: Who has spoken the sentence 13? (A) User (B) System

Ex Output:

Answer: (B) System