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 don't have any upscale guesthouses available. Is there a different price range I can help you find? Sentence2: Sounds great. I need to be there Saturday and we will be staying 4 nights. Sentence3: How about the Alexander Bed and Breakfast in the centre? It is a cheap guesthouse with free WIFI. Sentence4: I am sorry, there is no availability for those dates. Would you like me to try to find another hotel? Sentence5: Have a great day! Good-Bye. Sentence6: I don't care about the area. All that matters to me is that it has free wifi. Sentence7: I'm looking for an upscale guesthouse. Sentence8: As long as my reservation is for 2 people, we are set. Thank you! Sentence9: Yes let's try another hotel in the same price range. Sentence10: Thank you so much for your help. Sentence11: Thank you so much. I'm sure I will. Sentence12: Okay great. Glad I could be of help. Enjoy your stay. Sentence13: Is there any in the cheap price range then? Sentence14: I was able to get you into the El Shaddai and your reference number is JG24DZVF . Sentence15: Is there anything else that you need today? Sentence16: Your are looking for an upscale guesthouse. I can help you with that. There are a few options, what area would you like? Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System