I'm looking for a nice guesthouse to stay at during my trip to Cambridge. Anything with a 4 star rating will do.
The a and b guest house meets your needs. Would you like to book it?
Possibly, does this guesthouse hotel offer free parking and free wifi? 
How about Allenbell? This meets all your criteria. 
That could work. Where is Allenbell located?
The Allenbell is located in the East area.  Would you like its address?
I am also looking for a cheap restaurant in the area that serves vegetarian food. 
I'm not finding any cheap vegetarian restaurants. Is there something else you'd like to look for?
What price range do you have for vegetarian food in the centre area?
There are no results for a vegetarian restaurant in any price range in the centre area. Would you like to broaden your search to another area?
Are there any that serve spanish food instead? Preferably in the center area as well.
Yes. We have two restaurants that meet your criteria. Would you like me to book one for you? 
I just need the address for one of the restaurants.
The address for La Tasca is 14 -16 Bridge Street. 
Thank you. The last thing I think I need is a taxi. To pick me up at the restaurant by 10.00?
I'd be happy to help with your request, but first I will need to know what your destination is from the restaurant. 
I need to return back to the hotel from the restaurant.
All right, I have booked you a taxi from the restaurant back to your lodgings. It will be a white volkswagen, and it will arrive to pick you up at 10:00. Is there anything else you need?
Yes I will also need the contact number for the taxi. Thanks
The contact number is 07800878036. Anything else I can do for you?
What is the car type that will be sent?
The car is a white volkswagen. May I help you with anything else?
No, that is all! Thank you very much!
You are welcome. Have a great day, goodbye.