Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: Can you also help me find a train? Sentence2: i recommend old school architecture. its in trinity l;ane. can i give you the address Sentence3: What time would you like to arrive by and what time would you like to depart by? Sentence4: I'm interested in places to in the centre. Sentence5: I just need the train ID and the departure and travel times please. Sentence6: Yes and also the entrance fee and phone number. Sentence7: Absolutely! What day would you like to travel and where are you departing from? Sentence8: Okay. Thank you for your information. Sentence9: admission is free and the phone number is 01223332320 Sentence10: Would you like me to book it for you? Sentence11: I have that you are going to Ely Thursday by 8pm. Where are you departing from and when would like to arrive? Sentence12: Thursday and going to Ely! Sentence13: I am departing for Bishops Stortford. I need to arrive by 10:15. No departure preference. Sentence14: You are welcome. Thank you for calling. Sentence15: Yes I have the TR1923 that leaves Cambridge at 09:50 and arrives in Ely by 10:07. Sentence16: I would like to leave pretty early so I can spend the day. I would also like to have dinner there so sometime after 8pm. Question: Who has spoken the sentence 4? (A) User (B) System
Output:
Answer: (A) User