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: Booking was unsuccessful. Would you like to try booking on a different day or for a shorter duration? Sentence2: I will need to leave the gallery by 03:00 please. Sentence3: I think I'll need a taxi from the gallery to the hotel. Can you help with that? Sentence4: I also need a place to stay. I would like a hotel with 4 stars and free parking. Sentence5: I'm looking for museums to visit in town. Sentence6: No, that will be all. Thank you for your help! Sentence7: Can you try booking it for two nights? Sentence8: I was able to book that taxi for you. Be looking for a blue Lexus. If you need to reach them, please call 07049424951. Anything else I can help with? Sentence9: Can you book that for 1 person, 3 nights, starting Thursday? Sentence10: I think the acorn house will suit you well. Would you like me to book that? Sentence11: You're welcome, enjoy! Sentence12: No, I am not. Sentence13: I need to leave by 3:00, arrival doesn't matter. Sentence14: Where exactly is that located? And is there a fee to enter the gallery? How is the area? Is there a lot located around it to do? Thank you! Sentence15: Certainly. What time would you like to leave and arrive? Sentence16: There are several 4 star hotels with free parking, are you looking for one in the north as well? Sentence17: You're all set for 2 nights! Your booking reference number is BFODSBSL . What else can I help you with today? Sentence18: the broughton house gallery is a fantastic museum in the centre. Bonus, it's free! Sentence19: What time would you like to leave or arrive by? Sentence20: It is in the Centre and it is free to enter. Would you like to know anything else? Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System