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: reference number is K13L3ILC . Sentence2: Yes, could you book me tickets for 7 people on that train? Sentence3: Thank you. You have covered everything. Sentence4: The TR7223 arrives in Cambridge at 20:08. Will that suit you? Sentence5: There are 4, I would recommend Cambridge Artworks 5 Greens Road, postcode cb13ef, number 01223902168. There is no entrance fee. Is there anything else I can assist you with? Sentence6: thank you for using our system. have a good day. Sentence7: There are no cinemas in the east. Can I help find something else? Sentence8: Actually, yes, I do need that reference number on that train. And, maybe you could find a museum instead of a cinema? Sentence9: What about a museum? Are there any of those in the east? If so, please give me some additional information including the entrance fee. Sentence10: sure, what day are you traveling? Sentence11: I need a train that gets me into Cambridge by 21:30 Sentence12: I'm leaving on Saturday. I am coming from London Kings Cross. Sentence13: Can you recommend a cinema in the east? Sentence14: Absolutely! Go ahead and pay 132.16 GBP at the station for the 7 tickets. Would you like your reference number? Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System