You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: I would like to meet my friends at Las Vegas, please help me in booking a ticket from DTW to LAS.

ASSISTANT: Sure, may I know your travel dates please?

USER: My planned travel dates are on Dec 5 and Dec 7.

ASSISTANT: Do you have any particular times for your depart and return?

USER: I would like to depart in the afternoon.

ASSISTANT: Is there any specific class preference you have?

USER: Yes, I prefer an economy class.

ASSISTANT: Sure, may I know your connection limit?

USER: I need a flight with single connection.

ASSISTANT: Do you have any other preference?

USER: No more preferences.

ASSISTANT: May I know your name please?

USER: My name is Betty Campbell.

ASSISTANT: We have a flight from JetBlue airlines, number 1024 and the price is 100. Shall I proceed with it?

USER: Ok, please proceed for booking.

ASSISTANT: Your economy class seat is reserved.

USER: Thank you for your assistance.

ASSISTANT: Thank you for opting us.