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: TR3891 leaves at 16:40 and arrives at 19:23, will that work for you? Sentence2: How about Primavera? Admission is free! Sentence3: I have several entertainment venues across the city. What part of the city would you like to stay in? Sentence4: I need a train leaving Birmingham New Street after 15:45. Sentence5: There are no entertainment venues in the centre. Would you like something different? Sentence6: How about an entertainment venue? Sentence7: I am looking for information in Cambridge. Sentence8: The center of town has 44 different attractions I can recommend. Do you have a particular type you were interested in? Sentence9: Great, thanks for the info. I will go ahead and book myself later. Do you know of any good attractions in the centre of town? Sentence10: No problem. Glad I could help you today. Have a safe trip. Sentence11: What day would you like to travel on? Sentence12: sure, what would you like to know? Sentence13: How about a museum. Any you recommend is fine. I'll need the entrance fee, please? Sentence14: The centre please. Nothing further than that. Sentence15: I need the train for Saturday and I'm going to cambridge. Sentence16: thanks for your help Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System