You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am planning to book a ticket from PHX to SEA. Can you please help me out?

ASSISTANT: May I know your trip dates?

USER: I am planning to travel on Dec 20 and return back on Dec 22.

ASSISTANT: Do you have any other requirements to be met?

USER: I am looking for a connecting flight.

ASSISTANT: Can I have your name please?

USER: My name is Joseph Mitchell.

ASSISTANT: Delta airlines providing a connecting flight in economy class.

USER: That's fine, please proceed the booking.

ASSISTANT: Your booking is done.

USER: Thank you for your service.

ASSISTANT: Thank you.