You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Rebecca Edwards, planning to visit Washington city. Can you please book me a ticket from LAX to IAD?

ASSISTANT: Ok, I will help you. Can I know your planned dates of trip?

USER: My preferable journey dates are from 04/27 to 04/29.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait for your reply.

ASSISTANT: Flight 1009 from Spirit airlines is available for you.

USER: Please book my ticket with this flight.

ASSISTANT: Your ticket has been reserved successfully.

USER: Thank you for booking my ticket.

ASSISTANT: Most welcome, have a safe journey.