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: TR8913 will leave at 9:21 and arrive by 10:10. Do you want to book a seat? It will cost 12.80 pounds. Sentence2: The Express by Holiday Inn Cambridge meets your description. Would you like to make a booking? Sentence3: Is that leaving from cambridge? What day would you like to leave? Sentence4: Do you need help with anything else? Hotel, attraction, etc? Sentence5: Yes, I'm leaving from Cambridge on Wednesday. Sentence6: I do not want to book it. I just need the postcode. Sentence7: I need a train leaving after 8:15 going to stevenage. Sentence8: I'd be happy to help. Is it just you, or will you have other guests? And for how many days will you be staying? Sentence9: Any area would work. It needs to be a 2 star hotel. Sentence10: Yes, please book it for me. Sentence11: Their postcode is cb13lh. Can I help with anything else? Sentence12: Yes, a place to stay/ I am treating myself so make it an expensive one with free parking. Sentence13: That's all I needed. Sentence14: No that is all I need for now. Sentence15: Can you tell me what area you would like to stay in please? Sentence16: Ok great, have a fantastic day! Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System