You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Can you help me in booking a flight ticket from IAD to PHX?

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

USER: I want to travel on 03/08, and return on 03/10.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Is there any class requirement?

USER: I prefer for economy class.

ASSISTANT: May I know your preferable travel timings?

USER: I am comfortable with any time.

ASSISTANT: Would you like any lay off in between your journey?

USER: Yes, I need a lay off in between my journey.

ASSISTANT: Ok, can you please share your name to proceed further?

USER: I am Sandra Miller.

ASSISTANT: Delta Airlines has a connecting flight with number 1000 for fare 200, shall I proceed?

USER: Proceed with the booking.

ASSISTANT: Your ticket is reserved in economy class.

USER: Thanks for the help.

ASSISTANT: Thank you for choosing us.