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: Booking was successful. Reference number is : KZHALMQD . anything else? Sentence2: Yes, please. Can we get a table on the same day we arrive at the hotel? We'd like to eat at 20:00, if possible. Sentence3: I need a hotel in north Cambridge. Sentence4: Is the parking free? Sentence5: Yes, go ahead. I need it for Tuesday for 3 people and for 3 nights. Could you send me a reference number too? Sentence6: Perfect, thank you. That's all I needed. Sentence7: Your table has been booked for 3 people at 20:00 on Tuesday at Graffiti. Your reference number is BA1VAKNA . Sentence8: There are many good British restaurants in town. One of my favorites is Graffiti on the west side of town. Would you like me to make you reservations? Sentence9: Yes they have free parking. Sentence10: Can you also find an expensive british restaurant for me? Sentence11: There are 2 hotels in the north area of town, both have 2 star ratings and offer free wifi and parking. Can I book one for you? Sentence12: I told you Tuesday can I speak to a manager you are not paying attention. Sentence13: Excellent! Enjoy your visit. Sentence14: What day will you be staying there? Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User