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 have train TR0077 that leaves at 9:01 and arrives at 11:44. Would you like me to book it for you? Sentence2: Thank you. I need to find a train from Cambridge to Birmingham New Street leaving on Tuesday and I need it to arrive by 12:45. Sentence3: I would prefer the centre of town. Sentence4: I have a number of restaurants available. Is there a particular area of the city where you would like to go? Sentence5: You're welcome. Did you need more help? Sentence6: can you book a table for 3 on monday at 18:45 Sentence7: That is everything that I need. Sentence8: You are great thanks ! Sentence9: Glad I could help. Have a great day. Sentence10: I highly recommend Riverside Brasserie. It's located at Doubletree by Hilton Cambridge Granta Place Mill Lane. Is there anything else i can help you with? Sentence11: Yes for sure! That booking was successful and your reference number is L6EX6O5W . Sentence12: That sounds perfect. Could you book it for the same group of people, please? Sentence13: Where can I find a moderately priced restaurant that serves European food? Sentence14: I booked it for you. reference number is J92CR71U . Anything else today? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User