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: Yes. Something in the same area and same pricerange, please. Sentence2: I am so sorry, but I was not able to book this. Would you like to try a different restaurant? Sentence3: I can book reservations for a thai in the centre area that meets your needs Sentence4: You're very welcome. Goodbye. Sentence5: Can you help me find a restaurant by the name of Bangkok City? Sentence6: There are 6 of us. Sentence7: Yes please that would be great. We love thai. Sentence8: No thank you. I would like to book a reservation for Wednesday at 5:45 pm. Sentence9: Great news. I was able to book the Sala Thong and your reference number is VMHJ6Y3I. Sentence10: Unfortunately, the restaurant is booked. Would you like to try another restaurant? Sentence11: Yes please try to book a different Thai restaurant. Sentence12: Thanks so much. That is awesome! Have a good day! Sentence13: and how many people will the reservation be for? Sentence14: Certainly, bangkok city is a thai restaurant in the centre area in the expensive price range. Would you like their address? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User