U: I'm looking for a train departing from London Liverpool street.

S: I have a number of trains leaving from london liverpool street. Where are you going and when do you want to go?

U: I am going to Cambridge and need to arrive by 21:15 on Tuesday. Can you do that?

S: Yes I can. There are a total of 8 trains arriving by 21:15 on Tuesday. Would a train that departs at 17:39 and arrives by 19:07 be okay with you?

U: That will work, thanks. I need tickets for 3 people, please. Can you also provide a reference number once they're booked?

S: I have booked it for you and the reference number is: ZBGBFGTB

U: Thank you. What can you tell me about the leverton house?

S: Yes certainly. It is a guesthouse on the East side of Cambridge and has a rating of 4 stars. It also offers free internet and parking amenities.

U: Can you check to see if they have clean bathrooms because that is really important to me?
S: The Leverton House is extremely clean, guests say that the cleaning staff must take pride in their jobs.