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: Are you departing or arriving to Cambridge? And can you also tell me the other destination. Sentence2: There is a Japanese restaurant called wagamama at 36 Saint Andrews Street. Is this okay? Sentence3: What type of food do you have in mind? Sentence4: Can you help me find an expensive restaurant in the center part of town? Thanks. Sentence5: Are there any french restaurants that are expensive in the centre area? Sentence6: The postcode for cote is cb21uf. Is there anything else I can help you with today? Sentence7: i will be departing from cambridge on wednesday and will need tickets for 4 people. Sentence8: I would like some sushi Sentence9: Ok, I will need a little more information from you. How many tickets, for when and where are you departing from please. Sentence10: Thank you so much for calling Cambridge TownInfo centre! We hope you have a wonderful trip! Sentence11: How about TR3844? It leaves at 13:29 and arrives by 14:07. Sentence12: Yes, please book me for 4 people, and dont forget the reference number. Sentence13: I'll be leaving cambridge and arriving at bishops stortford on wednesday, I'd like to leave after 12:45. Sentence14: I also need train tickets. Sentence15: No thank you. What is the postcode? Sentence16: Cambridge and it will be early unless it rains Sentence17: You are all set for four on the train. Your reference number is CNKR13ES . Anything else I can help you with? Sentence18: No, that's all I need today. Thank you so much. Sentence19: and what is your destination? Sentence20: There is Cote at Bridge Street City Centre. The phone number is 01223311053. Would you like to make a reservation? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System