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: No, thank you. That will be all. Have a great day! Sentence2: holy trinity church, phone number is 01223355397, postcode is cb23nz. Is there anything else you need? Sentence3: Just give me the information for the first one that is free in the centre, like their phone number and postcode please. Sentence4: My pleasure to be of service. Have a wonderful visit to Cambridge. Goodbye. Sentence5: Hi, I'm looking for a place to go see architecture in the centre of town. Sentence6: No particular pricerange, but I want it to be a type of hotel. It doesn't need to include internet. Sentence7: There are 4 churches and an old schools. All are free except for great saint mary's church which has an entrance fee of 2 pounds. Which do you prefer? Sentence8: I think citycroomz would work well. Would you like more information? Sentence9: I actually would like to find a place to stay that is in the centre of town also. Sentence10: We have 5 potential options available to you. Is there a particular lodging type or price range you are interested in the most? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User