You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I serve you today?

USER: Please book a flight ticket from Phoenix, AZ - PHX to Philadelphia, PA - PHL. Can you help me?

ASSISTANT: Sure.

USER: Ok.

ASSISTANT: May I know your good name?

USER: My name is Barbara Carter.

ASSISTANT: When would you like to start your journey?

USER: My journey starts on 04/21 and ends on 04/23.

ASSISTANT: Do you have any restriction on price?

USER: Price should not exceed 1000.

ASSISTANT: Please standby, let me search a flight for you.

USER: Sure.

ASSISTANT: Thanks for waiting, there is a connecting flight available with fare 200 in UA airline and 1026 flight number. May I reserve it?

USER: Yes, you can.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for the help.

ASSISTANT: Thank you for choosing us, have a great journey.