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 am looking for a cheap place to stay that has free wifi. Sentence2: I am sorry the booking was unsuccessful. Would you like me to look at one of the other hotels that meet your criteria Sentence3: I have 10 hotels that meet that criteria. Is there a particular area you would like to stay in? Sentence4: I found a 4 star hotel with free wifi would you like me to book it? Sentence5: Yes for 8 people for 3 nights starting friday please. Sentence6: No, but it should be a 1 star establishment. Sentence7: Yes, lets go with 4 stars. Sentence8: On second thought, would you look for another hotel in the cheap price range? Please book it and give me the reference number. Sentence9: Okay. Have a good day! Sentence10: I'm sorry but all the cheap hotels with free wifi are either 0 or 4 stars? Would one of those options work for you? Sentence11: Booked at worth house. Reference number: DKEC3GVH . Sentence12: No thank you that will be all that I can think of . Sentence13: You are welcome. Thank you for contacting Cambridge TownInfo centre. You have a great day! Good Bye. Sentence14: That was great. Thank you goodbye! Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User