You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Jeffrey Carter.

ASSISTANT: How can I assist you?

USER: Can you help me in booking a flight ticket from DEN to LAS?

ASSISTANT: Sure, may I know your travel dates?

USER: I want to travel on 04/25, and need to catch return flight on 04/27.

ASSISTANT: Ok, do you have any preferences?

USER: I prefer for economy class.

ASSISTANT: Ok, JetBlue airlines providing flight with single connection and the flight fare is 100. Can I proceed with the booking?

USER: Proceed with the booking.

ASSISTANT: Your booking is confirmed and the flight number is 1022.

USER: Thanks for the help.

ASSISTANT: Thank you for choosing us.