You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I need to buy a plane ticket from PHX to PHL. Please help me in that.

ASSISTANT: Sure, may I know your name please?

USER: Margaret Jackson.

ASSISTANT: May I know your planned travelling dates please?

USER: My journey dates are from Dec, 11 to Dec, 13.

ASSISTANT: May I know your class preference please?

USER: I am happy with any class.

ASSISTANT: May I know your connection limit please?

USER: I need a single connecting flight.

ASSISTANT: There is a connecting flight of fare 100 with economy class in Delta airline, shall I proceed for booking?

USER: If the flight returns in the evening, then please proceed.

ASSISTANT: As per your requirement there is a connecting flight in United airline, shall I proceed for booking?

USER: Please proceed.

ASSISTANT: Your ticket has been confirmed with flight number 1012.

USER: Thank you for excellent service.

ASSISTANT: Thank you for reaching us.