You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today?

USER: Please book a flight ticket from PHX to IAD?

ASSISTANT: Sure, we are ecstatic to help you. Can you please forward your journey dates that you wish to travel?

USER: My journey dates are Oct 02 and Oct 04.

ASSISTANT: Do you need any flag stop in between journey?

USER: I need a direct flight.

ASSISTANT: May I know your good name please?

USER: I am Edward Clark.

ASSISTANT: Is there any other specifications regarding your journey?

USER: No.

ASSISTANT: Ok, please wait a moment. let me search a flight for you. Thanks for waiting, there are no flights available at this moment matching your particulars.

USER: No problem, thank you for your information.

ASSISTANT: Thanks for approaching us, wish you a nice day.