You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to travel from DEN to LAS. Can you help me to book a flight ticket?

ASSISTANT: Sure, can I know your trip dates?

USER: I want to travel in the flight on Dec 11 and Dec 13.

ASSISTANT: Do you have any specifications?

USER: I want to depart in morning time.

ASSISTANT: Can I know your good name?

USER: Debra Campbell.

ASSISTANT: I found a flight with the price of 500 and depart at 03:00 hours. Can I proceed to booking?

USER: Proceed to booking.

ASSISTANT: Your ticket has been reserved with the flight- 1027.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.