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, that is all, thank you. Sentence2: Yes, if there is one available. Sentence3: I need a restaurant in Cambridge that is expensive and also in the centre of town. Sentence4: Does Bedouin serve German food? Sentence5: Are there any Japanese restaurants in the same area and price range? Sentence6: Great! I'd like to make a reservation for 6 people at 17:15 on Tuesday. And I'd like a reference number, please. Sentence7: Booking was successful. The table will be reserved for 15 minutes. Your reference number is ZMGYWSSO . Is there anything else that I could help you with? Sentence8: I'm sorry I mean to say 9:15. I need to arrive by 9:15. Sentence9: There are 13 trains the latest is an arrival at 18:35 would that work for you? Sentence10: Wagamama is a Japanese restaurant in the centre area in the expensive price range. Sentence11: I'm looking for a train on the same day that arrives by 19:15 and departs from Norwich (going to Cambridge, of course). Sentence12: Yes, please reserve six tickets for us. Sentence13: It's my pleasure! Thank you for contacting us. Goodbye! Sentence14: I don't have any expensive german restaurants in the centre. Sentence15: No, it serves African style food. Would you like to find a restaurant that serves German? Sentence16: Bedouin at 100 Mill Road City Centre meets your criteria. Would you like a booking made for you? Sentence17: I have booked your tickets. The reservation number is 8IIV469O . The fee is 105.6 GBP payable at the station. Is there anything else I can do for you? Sentence18: TR0339 leaves Norwich at 07:16 and arrives in Cambridge at 08:35. Would you like me to reserve your tickets, and if so, how many will be traveling? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User