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: Yes please bookm it for me and I need the departure time. Sentence2: Certainly. Did you have a destination in mind? Sentence3: That sounds great! What is their address? Sentence4: You are welcome. Please let us know if you ever need assistance with anything else. Sentence5: Yes London Kings Cross. Sentence6: Great. Now what time would you like to leave by or arrive by? Sentence7: Arrive by 10:30 in London Kings Cross. Sentence8: How many tickets do you need? Sentence9: Just one please Sentence10: Thank you! That will be all. Sentence11: TR8636 will arrive by 09:51, would that work for you? Sentence12: OK perfect, I have that booked for you then, is there anything else I can help you with? Sentence13: It is located on herschel road and the phone number is 01223332360 Sentence14: I also need a college to go to in the west. Sentence15: Hi, I'd like a train leaving from Cambridge on Thursday, please. Sentence16: I have 5 different options for you. Might I suggest Clare Hall. It has free admission and it is a great campus to tour. Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System