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 am sorry I was not able to book that. Is there another restaurant or time you would be interested in? Sentence2: I will be going from The Acorn House to the Dojo Noodle Bar. Sentence3: Yes, that is located North. would you like to book a room? Sentence4: I was able to book that reservation for Monday at 14:00 for four people, reference number 7VB3NKTI . The table will be reserved for 15 minutes. Sentence5: I am also looking for a hotel. Can you find the Acorn Guest House? Sentence6: I'm sorry, there are 0 steakhouses in Cambridge. Perhaps another type of food? Sentence7: There are 5. Dojo noodle bar looks to be a good match. Sentence8: The Acorn House is in the north and the phone number is 01223353888. Sentence9: That's all. Thank you. Sentence10: Yes, for four people, on Monday, at 15:00. Sentence11: Certainly. Where will you be departing from? Sentence12: You're welcome. Have a great day. Sentence13: Hi, I'm looking for a steakhouse, please. Sentence14: How about 14:00 instead? Sentence15: Great! I'll also need a taxi that will get me to the restaurant in time for that reservation. Sentence16: What about asian oriental food? Sentence17: No, I would just like a phone number. What area is that in? Sentence18: I was able to get you that taxi. Be looking for a red Skoda. If you need to reach them, their phone number is 07143451074. Anything else I can do? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User