U: I am looking for a train leaving on wednesday arriving by 16:00.

S: Okay. What is your destination?

U: I am going to be leaving from London Liverpool Street and travelling to Cambridge.

S: Sure, I can help with that.  How close to 16:00 would you like to arrive?

U: It doesn't matter. Just tell me when it departs so I can be there on time.

S: The best option for you is the train arriving at 15:07 and leaving at 13:39. Would you like me to book that for you?

U: Not just yet. Could you give me the train ID, though?

S: The train ID is TR2826. Is there any other thing i can help you with?

U: I need a moderately priced guesthouse.

S: how about a and b guest house? it looks lovely

U: Are the bathrooms clean?
S: A and B Guest House according to past patrons do not offer clean bathrooms for guests.  Can I help you with anything else?