I would like a train going to kings lynn.
The TR3112 will get you there by 05:58.  Will that work?
I don't want to leave until after 17:30.
Okay, there are many options for you to leave after 17:30 to Kings Lynn. Where are you departing from?
From Cambridge. 
What day will you travel?
I'll be leaving on Tuesday
Great. There are several trains available. What time would you like to leave by?
I would like to leave after 17:30. 
I can get you a ticket on TR9452 it will arrive by 18:58, how many tickets please?
I just need one ticket for myself. Can I get a reference number?
Booking was successful, the total fee is 9.8 GBP payable at the station. Reference number is : E9TVYR9Y. You are all set. Is there anything more I can help you with?
I am also looking for a hotel in the north with 4 stars and free parking.  I would like to book for 2 nights starting sunday.  
Sounds like your in a hurry, lets find a place before booking.  Right now I see nothing that matches you search for hotel or guesthouse.