You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me to book a flight from ORD to DEN?

ASSISTANT: Sure, may I know your dates of journey please?

USER: My travel dates are Sept 19 to 21.

ASSISTANT: Please mention your name?

USER: I am Michael Campbell.

ASSISTANT: May I know your requirement please?

USER: I prefer connecting flight.

ASSISTANT: There is a direct flight of fare 100 with the UA airline, are you fine with this booking?

USER: Please proceed.

ASSISTANT: Ok, your booking is done with the flight number 1009.

USER: Thank you.

ASSISTANT: You are welcome, have a safe flight.