You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Could you please check the flight availability in economy class?

ASSISTANT: Sure, may I know your name please?

USER: My name is Catherine Harris.

ASSISTANT: May I know your travelling airport codes please?

USER: My source is IAD and destination is ORD.

ASSISTANT: May I know your planned travelling dates please?

USER: My travelling dates are Sept 15 and Sept 17.

ASSISTANT: May I know your connection limit please?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other specifications please?

USER: No.

ASSISTANT: Delta airline is providing a connecting flight of fare 200 with economy class, shall I proceed for booking?

USER: Yes, proceed.

ASSISTANT: Your ticket has been confirmed with flight number 1011.

USER: Thank you.

ASSISTANT: Thank you for reaching us.