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: We have the bridge guest house which is moderately priced and the lensfield hotel which is expensive, would you like me to book you for either one? Sentence2: Yes the train should go to cambridge and should leave after 18:30. Sentence3: I have several available. What days would you like to stay? Sentence4: Sure, Are you traveling to cambridge? What time would you like to leave or arrive by? Sentence5: Either one is fine. I want it for 6 people for 2 nights starting wednesday. Sentence6: Thank you. Yes, I think I'll be traveling by train wednesday as well. Are there any trains leaving ely on that day? Sentence7: I recommend train TR0328. It departs at 19:35 and will get you there by 19:52. Want me to book it? Sentence8: I do not have any hotels in the east with a 3 star. Would you like to try something else? Sentence9: I'm looking for a place to stay in the east. Sentence10: Ok I was able to book your party at Bridge Guest House. Your reference code is ZUFSD1J5 . Is there anything else I can help you with tonight? Sentence11: Not right now, thanks. What's the total travel time for that train, though? Sentence12: Safe travels and if you need anything else, please contact us. Sentence13: I don't need to book it. I need a 3 star in the east. Sentence14: I believe that's it. Thanks so much for your help! Sentence15: It's a quick, 17-minute trip. Is there anything else I can help you with today? Sentence16: Can you find something in the south? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User