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 think that is all I need, thank you. Good bye. Sentence2: I can recommend a museum for you. First, was there a particular area of town you wanted to visit? Sentence3: I am open to suggestions on the location. Sentence4: I'm looking for museums Sentence5: Booking was successful, the reference number is FDCBUD77 the table will be held for 15 minutes, anything else that I can assist with? Sentence6: I was unable to book at that time. would you like to try another time? Sentence7: I am on a tight budget so would prefer something in the cheap price range. Sentence8: The cafe jello gallery is a museum in the west of town. Sentence9: I'm happy we were able to help you today. Enjoy your time in Cambridge! Sentence10: Do you have a preference for the price range? Sentence11: Can you recommend an Italian restaurant in the centre as well? Sentence12: Yes, can you try to book at 17:45? Sentence13: zizzi cambridge is in the cheaper range, how does that sound? Sentence14: That sounds perfect. Can you book me a table for 3 on Thursday at 18:45? Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System