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: Sounds great. Can you please book that for me for Tuesday for 2 people, 2 nights please? Sentence2: There are 5 trains available what time would you like to leave by? Sentence3: Okay, TR0927 leaves at 13:29 and arrives at 14:07. Shall I book you a seat? Sentence4: No, I'll look it up later and do it myself. But could you tell me if there are any 4 star places to stay in the city centre? Sentence5: I was able to successfully book you, your reference number is D53TP7EU ., can I assist with anything else? Sentence6: What is your destination? And what day are you hoping to travel? Sentence7: I'd like to leave before 14:00 Sentence8: A train depart from Cambridge and arrive by 19:00 Sentence9: Nope, that's all I need today. Thanks! Sentence10: They both have free parking and wifi. How about the alexander bed and breakfast? It's on the cheaper side, 4 stars, and really quite lovely. Sentence11: Which ever one has free parking and wifi. Sentence12: You're welcome. Have a great day! Sentence13: There are two, a cheap guest house, and an expensive hotel. Any preference? Sentence14: I need to leave on Thursday and am heading to Bishops Stortford. Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System