You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Mark Taylor, want to travel from LAS to DCA.

ASSISTANT: Sure, can I know your preferable dates?

USER: My travelling dates are from 09/23 to 09/25.

ASSISTANT: I found a flight 1009 of JetBlue airlines matches with your preferences, can I proceed?

USER: Yes, please proceed with the booking.

ASSISTANT: Your ticket is booked.

USER: Thank you for your help.

ASSISTANT: Thank you, have a good day.