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, I do. I'd like to leave from Birmingham New Street on Monday and arrive in Cambridge. Sentence2: There are 2 which would you like? There is one in the south and the centre Sentence3: Yes, could you make a reservation for 6 and provide me the reference number when complete. Sentence4: Okay thanks, you've been a lot of help. Bye! Sentence5: I need to leave after 16:45 please. Sentence6: All booked for 6! Your reference # is 9WAFMF6U . Anything else I can do for you? Sentence7: And what time would you like to travel on monday? Sentence8: Thank you for contacting us, you have a nice day. Sentence9: TR3130 leaves at 17:40 on Monday from Birmingham New Street to Cambridge. Would you like me to book you a seat? Sentence10: Can you get me the area and postcode for a cinema in Cambridge? Sentence11: I would be happy to help you find a train! I have several options, do you require a particular departure or arrival time? Sentence12: the postcode is cb17dy this is the one for the south area. Sentence13: It doesn't really matter. How about the one in the centre? Sentence14: I need a train from Birmingham new street to Cambridge departing on Monday. Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User