I am trying to book a train.
What an excellent way to see the beautiful countryside. What other information can you give me? 
I want to travel from Cambridge to London Liverpool Street on Thursday after 09:45. 
I see that there are 8 trains available. What about TR2715 that leaves at 09:59?
I would like price, please
Certainly. Any ticket on that route is going to cost 16.60 pounds.
I'm also looking for a hotel to stay that has a star of 0 in the expensive price range. 
There are no hotels in Cambridge that are expensive with a 0 star rating. Would you like to change either the price range or the star rating?
There's nothing in the north?
I do have City Centre North B and B in the north. It's in the cheap price range with 0 stars. Might that work for you?
Yeah, I think that would be all right.
Can I assist you with making a reservation there? 
Yes please for 8 people, 5 nights starting Saturday.
unfortunately this b&b is booked for those dates, is there another day or shorter time that would work? Or should we search another area?
Are there in hotels in the north with a 2 star rating?
There are no cheap hotels in that area with 2 stars.  Can I check for a guesthouse for you or would you like another area?
I would prefer you to check another area, please.
I can not find anything that meets that criteria. We can change the price range or the star rating and search again if you like?
Can you search for one that is cheap in price then?
Nothing is rated 2 stars in any part of the city, what specifically would you like?
I need something in the cheap price range with other restrictions retained.
No matching records for that. How about we change the star rating?
Are there any cheap 0 star hotels in the north?
Yes, there is city centre north b and b, would you like me to book you?
Can you book that for 8 people for 1 night since 5 nights did not work earlier?  
City Centre North B and B was available for Saturday night for your party of 8. Your reference number is D5Q373D5. Is there anything else I can help you with?
That would be it. Thank you
You're welcome. Have a nice day.