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: I would like to go to Norwich and leave on a Saturday. Sentence2: That should be it! Thank you for your assistance! Sentence3: There are 13 of them. Downing College on regent's street is free, you might be interested in it. Do you have any specific needs? Sentence4: Yes, please. I need 8 tickets and my reference number please. Sentence5: Yes I also need a train leaving after 12:45 from cambridge Sentence6: Their phone number is 01223334860. Is there anything else I can help you with? Sentence7: There is a train that leaves at 13:36 and arrives at 14:55, can I book you for that? Sentence8: Where are you wanting to go to and what day? Sentence9: I have 8 tickets booked for you and your reference number is 90IJJ88B . Sentence10: How about the phone number? Sentence11: Thank you for contacting us today, have a nice day. Sentence12: Hi, I'm looking for something to do in town. Are there any place like college I can visit in the centre of town? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User