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 very sorry a and b guest house does not have availability for your request. Would you like to try a shorter stay or a different day? Sentence2: Sure, what day will you be staying and for how long? Any price range? Sentence3: Yes, I will need accommodations for 7 people, for 5 nights. We want to check in Thursday. Sentence4: I have museums, boating excursions, basic entertainments, parks and swimming pools. Any of these spark your interest? Sentence5: Please try for two nights then at minimum from Thursday evening on. We need a guesthouse for 7 people, and I will need the reference number when booked. Thanks! Sentence6: Never mind. That will be all. Sentence7: Hi, what kind of attractions are there in the east? Sentence8: Is there a guesthouse nearby that is rated at least 4/5? Sentence9: The A and B Guest House is close by. It has a 4 star rating and moderate pricing. Would you like me to book it for you? Sentence10: Now I will need to find a hotel for the remainder of my visit. Can you help with that? Sentence11: Try the funky fun house. It's on cherry hinton road. Sentence12: Yes the A and B guesthouse is a guesthouse. Would you like me to book it for you? Sentence13: Okay, I was able to book the questhouse for you for two nights starting on Thursday. The reference number is O4OXDCIW . Is there anything else I can help you with today? Sentence14: What would you recommend? Sentence15: Okay, I hope you have a pleasant stay! Sentence16: That sounds like what I'm looking for. Is it a guesthouse? Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System