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: Okay, happy to help! would you like more information or a reservation? Sentence2: I have several trains traveling to stansted airport, which day would you like to leave? Sentence3: no. that is all i need. thanks. bye. Sentence4: Yes, that sounds good. Thank you. Sentence5: I need to take a train from Cambridge to the stansted airport, which train would be the best one? Sentence6: I would take the guesthouse. Sentence7: Is there anything else I can help you with? Sentence8: I need to leave on Tuesday after 16:00, please. Sentence9: The hotel please. I need to book it for 3 people 4 nights starting friday. Sentence10: Okay I have two different options. There is a guesthouse and a hotel. Both have free parking and wifi. Any preference as to which one? Sentence11: Great! Have a nice evening. Sentence12: TR0471 leaving Cambridge on Tuesday at 16:40 and arriving at Stansted Airport by 17:08. Would this one work for you? Sentence13: Yes I'm looking for a place to stay in the south part of town with a 3 star rating. Sentence14: You are booked into the lensfield hotel. The reference number is O46I4NOR . My I help you with something else? Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System