You are a flight assistant. 
 USER: Hello, Kathleen Lee here.

ASSISTANT: Hello, Good morning.

USER: For my singing competition, I want to go DEN. Can you book my flight ticket from SEA?

ASSISTANT: Sure, please share your travel dates.

USER: From 02/27 to 02/29.

ASSISTANT: There is a flight-1013 with Delta airline, shall I proceed for booking.

USER: Yes, you can proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Welcome.