You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be there for you?

USER: I am Shirley Roberts. Can you help me in booking a flight ticket from PA - PHL to TX - DFW?

ASSISTANT: Sure, may I know when are you planning to travel?

USER: I want to fly on 01/04 and return on 01/06.

ASSISTANT: How much can you spend for this booking?

USER: My price limit is 500.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Delta airline is providing a flight 1002 on your way and the fare is 200. Shall I proceed?

USER: You can proceed to booking.

ASSISTANT: Your booking has been done.

USER: Thank you.

ASSISTANT: Thank you for choosing us.