You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please book a flight ticket from IAD to PHX?

ASSISTANT: Sure, let me know your trip dates please?

USER: Thank you. I have planned my travel dates as May 31 and June 02.

ASSISTANT: Do you have any airline preference?

USER: No, I do not have any airlines preferences.

ASSISTANT: May I know your connection limit?

USER: Sure, I am looking for direct flight as I have to reach Phoenix as early as possible.

ASSISTANT: Do you need any other specifications?

USER: I would like to depart  in evening time so please make sure that.

ASSISTANT: Ok, can I know your name please to proceed further?

USER: Sure, myself Thomas Thomas.

ASSISTANT: American Airlines is providing direct flight with the ticket fare of 100 and depart time is 22:00 PM, arrival time is 15:00 PM. Shall I proceed?

USER: That is fine, please proceed with booking.

ASSISTANT: Your ticket has been confirmed by flight number 1001 and an economy class.

USER: Thank you for your help.

ASSISTANT: Thanks for choosing us.