Hello!  I need a place to stay, can you help me find something in a moderate price range?
Sure, what area would you like to stay in?
In the East. 
I have three places, will you need parking?
I don't need parking, but the I'd prefer to stay in a guesthouse.
How about the Warkworth House? They're a moderate guesthouse in the east part of town. Would you like to book a room?
Yes, please.  I'd like to book for 4 people for 2 nights staring on Saturday.
Booking was successful.
Reference number is : 6DRA6J6P.

Thanks! I also need a train to Stansted. 
What day would you like to travel? 
I would like to leave on Monday after 8:30 to go to the Stansted airport. 
How about the TR0797 train? It leaves Cambridge at 8:40 and arrives at Stansted at 09:08.
That sounds perfect, can you book my same group some tickets?
Train TR0797 is booked for 4.  Your reference number is O925IZ27 and the total cost payable at the station is 40.4.
Thank you very much, that will be all for today.
Thank you and enjoy your travels. Have a great day!