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'm afraid I couldn't get you that booking. Would you like me to try another place or a shorter stay? Sentence2: I'm afraid that booking was also unsuccessful. Would you like to try a shorter stay or another hotel or guesthouse? Sentence3: Yes can I get the postcode, and it's a concerthall you said? Sentence4: I was successful in booking 1 night at alexander bed and breakfast on tuesday for 6 people. your reference number is R6FET1MJ . Can I help with anything else? Sentence5: I'm pleased I could assist you. Sentence6: Alexander B & B has both free wifi and parking. It also has 4 stars! Would you like to make a booking there? Sentence7: Hi, i want to find out about the man on the moon attraction please. Sentence8: Yes, please. For 6 people for 3 nights starting on tuesday Sentence9: Excellent, I also need a cheap guesthouse, please. Sentence10: Yes it is a concert hall and the postcode is cb12lf. Sentence11: Alexander bed and breakfast is in the cheap price range in the centre of town. Sentence12: Please try for one night. Sentence13: I need free parking and wifi. Sentence14: How about for 2 nights instead? Sentence15: No that was it. Thank you so much for your help. Sentence16: the man on the moon is a concerthall found in the center of town. Do you need their address and contact details? Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System