U: I'm looking for a train that runs on Tuesday.

S: Sounds good, Where will you be arriving from and going to?

U: I will be departing from london liverpool street and arriving at cambridge.

S: I have many travel time to choose from. Do you have a preferred travel time?

U: I want to leave after 14:45.

S: The TR5245 leaves London Liverpool Street at 15:39 and gets into Cambridge at 17:07. Would you like me to book it for you?

U: That sounds great.  Will you make a booking for 5 people please?  And I'd like the reference number for my records.

S: Ok   I will book it for you for 6 people

U: Actually I only need it for 5 people and I will need a reference number.

S: Booking was successful, the total fee is 83 GBP payable at the station. Reference number is : 7F4OHHP6 Payable at the desk, any other questions today?

U: Yes, could you help me find a North American restaurant that is expensive.

S: The gourmet formal kitchen is a great choice. Shall I book it?

U: I need a place with good ambience.
S: This might not be the best choice for you. Past diners referred to the ambiance as "mediocre". Would you like to look at other dining options?