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

Positive Example 1 -
Input: 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
Output: Answer: (A) User

Positive Example 2 -
Input: Sentence1: Guten Tag, I am staying overnight in Cambridge and need a place to sleep. I need free parking and internet. Sentence2: I have 4 different options for you. I have two cheaper guesthouses and two expensive hotels. Do you have a preference? Sentence3: No, but I'd really like to be on the south end of the city. Do any of those fit the bill? Sentence4: Sure. Does price matter? We can narrow it down and find exactly what you need. Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (B) System

Negative Example 1 -
Input: Sentence1: I am looking for a hotel named alyesbray lodge guest house. Sentence2: i have their info, what would you like to know? Sentence3: I would like to book a reservation for it. Can you help me with that? Sentence4: I sure can. First, I will need to know when you want your stay to begin and how many days you'll be staying. Also, how many people will be staying? Question: Who has spoken the sentence 1? (A) User (B) System
Output: Answer: (A) User

Negative Example 2 -
Input: Sentence1: Hi there! Can you give me some info on Cityroomz?. Sentence2: Cityroomz is located at Sleeperz Hotel, Station Road in the Centre area. It is a moderatley priced hotel with a 0 star rating. Would you like to book a room? Sentence3: Yes please. I need it for 7 people for 3 nights starting on tuesday. Sentence4: How many days would you like to book it for? Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (A) User

Now complete the following example -
Input: Sentence1: No thanks. Thank you for working with me on the second booking. Have a great day. Sentence2: Wait...it is expensive? I was looking for a moderately priced place. Sentence3: Done! The table will be reserved for 15 minutes. Your reference number is 0E8ZWWQN . Can I help you with anything else? Sentence4: I want to go to a museum. Sentence5: No worries, I found 3 Chinese restaurants that are priced moderately. I recommend the Jinling Noodle Bar. Would you like a reservation? Sentence6: What time would you like that reservation? Sentence7: Id like to make a reservation for 4 on sunday. Sentence8: An art gallery would be wonderful. Sentence9: The phone number is 01223314960. Is there anything else I can do to assist you today? Sentence10: At 18:30 please. Sentence11: How about Broughton House Gallery over in Centre, they are located at 98 King street and has no entrance fee. Sentence12: yes book for 4 people at 18:30 on sunday Sentence13: So ugly duckling is in the centrem it's pretty expensive and they don't have a phone number, but they're on 12 St. Johns Street City Centre. Sentence14: You are very welcome. Enjoy your day. Bye. Sentence15: In which specific area of town are you interested? Sentence16: Yes, the price range is expensive. Did you want me to cancel it? Sentence17: Yes, I'm also looking for a chinese place to eat in the same area. Sentence18: Booking was successful. The table will be reserved for 15 minutes. Reference number is : LI8D2S6Y . Is there anything else I can assist you with? Sentence19: Oh God, yes. I want to eat at a moderately priced restaurant. Sentence20: Yes, that would be great. Can you also give me the phone number for that location? Sentence21: There are many wonderful museums; is there anything more specific? Art, gallery, archaeology that you want to see? Sentence22: I would like to stay in the centre area. Question: Who has spoken the sentence 19? (A) User (B) System
Output: 


Answer: (B) System