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: Can you give me the address to the hospital in Cambridge? Sentence2: please contact us again in the future. goodbye. Sentence3: there are 21 options. do you have any other requirements? Sentence4: I would recommend the Allenbell. It's a cheap guesthouse in the east. Their phone number is 01223210353. Sentence5: At what time do you want to travel? Sentence6: What is your destination? Sentence7: I would like to arrive by 11:45. I will need to buy 5 tickets once we find a train. Sentence8: Going to Cambridge. Sentence9: I am actually looking for a train on sunday from peterborough. Sentence10: No. Just free parking and free wifi. Also I'll need the phone number please? Sentence11: I have train TR7721 arriving at 7:38 would you like that one? Sentence12: I am also looking for a guesthouse. I need free parking and free wifi there. Sentence13: Yes, five tickets, please. What is the reference number? Sentence14: The address is Hills Rd, Cambridge Postcode : CB20QQ Sentence15: Sounds great, thanks! That's all that I need, thanks so much! Have a great day! Sentence16: Your reference number is CIGYXAW9 . Do you need anything else? Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System