You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Carol Lee.

ASSISTANT: How may I help you?

USER: I would like to travel from DCA to LAS, could you help me out?

ASSISTANT: Sure, please share your travel dates.

USER: My preferable dates are from 12/13 to 12/15.

ASSISTANT: I found a flight 1004 of UA airlines matches with your preferences, can I proceed?

USER: Please proceed with the booking.

ASSISTANT: Your ticket is booked.

USER: Thank you, have a good day.

ASSISTANT: Thank you for reaching us. Happy journey.