You are a flight assistant. 
 USER: Hello. Laura King is here.

ASSISTANT: Hello, how may I guide you?

USER: Can you book my ticket from DFW to IAD?

ASSISTANT: Can I know the dates of travel?

USER: From 09/21 to 09/23.

ASSISTANT: Hold on for a moment.

USER: Ok.

ASSISTANT: Flight 1012 of Southwest airlines is available with your dates, can I book the ticket?

USER: Yes, please book my flight ticket.

ASSISTANT: Your ticket is booked.

USER: Thank you.

ASSISTANT: Thank you, have a safe flight.