You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: Can I please get their phone number and postcode? Sentence2: Your room at the Express by Holiday Inn Cambridge is all set up for Friday. The reference is 7F6ZIHSZ . Is there anything else I can help you with today? Sentence3: Thanks for that information. What area are you looking to stay in? Sentence4: Thank you! I am also looking for a place to go in town. I'm thinking a college in the centre. Sentence5: I hope you enjoy your time in Cambridge! Sentence6: The express by holiday inn cambridge is located in the east and meet your criteria. Shall I book you a room? Sentence7: Okay I've got a white Honda booked for you to pick you up at 2:45 and take you back to your hotel, their number is 07078899267 Sentence8: For how many people? Sentence9: Christ's College is located in the centre at saint andrew's street. Sentence10: And how many nights? Sentence11: The area doesn't matter I would like an expensive hotel if you can find one. Sentence12: Yes, please book me a room for friday. Sentence13: Certainly, we have many fine guest houses and hotels in Cambridge. Is there anything specific you were looking for, to help narrow it down? Sentence14: Thank you. That is all I need. Sentence15: Hi, can you give me some information on places to stay for my upcoming trip? Sentence16: I need it for 2 people please. Sentence17: 5 nights please. And I would need the reference number also. Sentence18: Their phone number is 01223334900. The postcode is cb23bu. Sentence19: Thanks! I'm going to hanging out at the college late tonight, could you get me a taxi back to the hotel at 2:45? Sentence20: I'm looking for a 2 star hotel with free wifi. Question: Who has spoken the sentence 6? (A) User (B) System
Answer: (A) User