U: What trains leave London Liverpool Street and go to Cambridge?

S: There are several trains that depart from London Liverpool Street on Friday. Is there a particular time you wish to leave by?

U: Yes, sometime after 09:15.

S: There are several trains departing on Friday every :39 of the hour from 9:39 to 23:39. Would you like me to book one of these for you?

U: I'll go with the 9:39.

S: Wonderful, your train has been booked!

U: I think I forgot to add that I will need the booking for 3 people please. Will you modify the booking for me?

S: Great! Thank you for your help.

U: Please modify the booking for three people please.

S: Sure. Just a moment.

U: I need a reference number for the train. Then I need to find a moderate Italian restaurant in the east for 3 people at 16:30 on Saturday, and a reference number.

S: Ok, I have three tickets booked on the 9:39. The reference number is QOL9GX6F. Does Pizza Hut Fen Ditton sound good? It's the only Italian restaurant in east.

U: Do they serve high-quality Arancini?
S: I have two opinions about this. Both of the opinions of people who ordered Arancini say that the food was tasty.