You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Please help me in booking from PHX to ORD.

ASSISTANT: Sure, can I know your travelling dates to search for the flight?

USER: My travelling dates are from Apr 28 to Apr 30.

ASSISTANT: May I know your class preferences?

USER: I prefer economy class.

ASSISTANT: Do you have any requirements?

USER: I need a connecting flight.

ASSISTANT: There is a connecting flight 1012 of United Airlines, can I proceed?

USER: Ok, please proceed to book by the name Shirley Baker.

ASSISTANT: Your booking is done in economy class.

USER: Thank you.

ASSISTANT: Welcome.