Task-oriented dialogue about: restaurant

Hi! Can you help me find a particular restaurant?
Of course, there are 110 restaurants in town. Would you like me to search by restaurant name?
Yes, I am looking for the Varsity Restaurant.
The Varsity Restaurant serves international food in the center of town. Do you want me to book it for you?
Yes, can I get a table for 4 on saturday at 15:15?
Yes, I will book a table for 4 on Saturday at 15:15.
Excellent. I'll need the reference number.
unfortunately they are filled up for that time would you like me to reserve another time or would you like to choose another restaurant.