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 3 options for moderately priced Chinese in the centre. I would suggest jinling noodle bar. Sentence2: No problem. I would like a place to eat. Chinese food around the centre of town. Sentence3: No that is fine but I do need a taxi to arrive at the reastaurant by 14:45 and pick me up from the hotel. Sentence4: Ok, your booking was successful. The table will be reserved for 15 minutes, the reference number is : SBDEVYH9 . Sentence5: I need it to have free parking too. Sentence6: yes is should be expensive Sentence7: I don't see where you have chosen a hotel. Perhaps we should look at that first? Sentence8: There is nothing that matches your criteria. Sentence9: The jinling noodle bar had already been booked for you, is that not ok? Sentence10: No I just need their phone number and address. Sentence11: is it expensive? Sentence12: Yes I have both guesthouses and hotels that are 4 stars. Any preference on amenities or price? Sentence13: I can suggest allenbell. Sentence14: We have 9 moderately priced guesthouses with parking, which side of town are you looking for? Sentence15: Hmm, I don't usually like the cheaper places. How about anything that is moderately priced? Sentence16: Okay I have many choices. Do you have a preference for price? Sentence17: The university arms hotel sounds like exactly what you're looking for. Would you like me to book it for you? Sentence18: That will be nice. Can you book it for monday at 14:45 for 3 people? Sentence19: I am looking for the centre area. Sentence20: I've heard great things about HK fusion. Sentence21: Thank you. Going back, I don't think we chose a hotel. I need a moderate price guesthouse with 4 stars. Remember? Sentence22: I'm looking for a 4 star hotel. Can't wait to check out Cambridge. Sentence23: Based on the criteria, I cannot find a hotel. Would you like to try a different preference? Sentence24: They are on regent street and the phone number is 01223351241. Sentence25: What about an expensive one? Sentence26: Yes an expensive one would be great with a 4 star rating and free parking. Sentence27: Actually, I am looking for one that is in the same price range as the hotel for 3 people at 14:45 on Monday. Sentence28: no quite cheap actually Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User