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: Yes their telephone number is 01223446100. Is there anything else I can help you with today? Sentence2: Cherry hinton water play is in the east area. Would you like the address? Sentence3: I'm sorry, there must be some confusion. I am unable to make a reservation at a park. Were you looking for something else? Sentence4: Yes. I have five parks. Is there a particular area you are looking in? Sentence5: Hi there. Can you assist me in finding a park in Cambridge? Sentence6: You are welcome. Thank you for contacting Cambridge Towninfo Centre. Sentence7: Yes could you make me a reservation there for 8 people at 13:45 on Sunday? I will need a reference number as well. Sentence8: I don't need the address, but could I get a phone number? Sentence9: I have confirmed your reservation for Sunday at 13:45. Your reference number is ECMLT2OE . Do you need help with anything else? Sentence10: Sorry, I'd like to make a reservation for 8 people at the Pizza Hut Cherry Hinton for 13:45 on Sunday. I need a reference number, too. Sentence11: Are there any in the east part of town? Sentence12: That should be everything, thank you for your help today! Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System