I need a train that departs from cambridge and arrives at london liverpool street. Can you help me?
I'd be happy to. Do you have a specific date and time for your departure?
I want to leave on Saturday and should arrive by 18:00, I have a doctors appointment to see to.
The TR4466 arrives in London Liverpool Street at 15:27, would that be acceptable?
Yes what is the price, departure time, and travel time?
It is 13.28 pounds, will arrive 15:27, and the travel time will be 88 minutes. Can I help you with anything else? 
Yes, I'll also need a place to stay in the south and would prefer a guesthouse.
ok I have a few options. Is there a price range you would like to stay at?
No specific price range, but I do need free parking.
Rosa's Bed and Breakfast is a great one in that area and cheap. It includes free parking and wifi. Would you like me to book you a room?
Yes, please. I would like to book for two nights and two people starting Saturday.
Unfortunately there is no space for your request. Would you like to check another hotel or change the length of stay?
How about for just two nights 4 people at Rosa's Bed and Breakfast?
Are you trying to shorten your stay? And, may I confirm the stay is for 2 people?
I would like to try for 2 nights since there is no space and I want it for 4 people please. 
Im sorry i was unable to book that. Is there another hotel you would like to try?
Let's try a different guesthouse in the south, then.
We have 2 other choices - both of which are moderately priced guesthouses in the South.  The guesthouses are bridge guest house and aylesbray lodge guest house.  Do you have a preference?
Do either of them offer free parking? 
Yes, they all offer free parking.
Can you book one for 4 people for 4 nights starting Tuesday please.
Unfortunately, none are available for that stay. Would you like me to check availability for a shorter stay? 
Yes, can you try 2 nights please?
I was able to book aylesbray lodge guest house for 2 days with 4 people. Reference number is AULI4NVQQ.
Thank you, that is everything i need.
You're welcome. Have a great trip!
You are welcome, enjoy your trip.
Thank you for using our services. Is there anything else I can help you with today?
Nope that is thanks
Glad to be of service! So long.