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: Their number is 01223812660. Sentence2: Great! Have a great day! Sentence3: Unfortunately, they are fully booked during that time slot. Would you like me to try for a different time or day? Sentence4: Yes, I'm looking for a cheap place to eat on the east side. Do you know of anything? Sentence5: How about 11:15? Sentence6: Yes. Please give me the telephone number. Sentence7: yes I have one listing for an international place called The Missing Sock. It is very popular. Would you like their telephone number? Sentence8: Thank you so much, that is all I needed! Sentence9: Thanks! Now could you make a reservation for me? I need a table for 1 on Saturday at 12:15, please. Sentence10: May I have the reference number please? Sentence11: Your reference number is FK3AREID . Sentence12: You've been booked for 11:15. Do you need anything else? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User