You are a flight assistant. 
 USER: Hello, I am Mary Lewis.

ASSISTANT: Hello, how may I help you?

USER: Can you please book a ticket from IAD to ORD?

ASSISTANT: Sure. Please wait for a while. Can I have your journey dates?

USER: I would like to go on 09/29 and return back on 10/01.

ASSISTANT: Please wait for a moment. There is a connecting flight available with Frontier airline, shall I book it?

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: Your booking is done with flight number 1008. Happy journey.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us. Happy journey.

USER: Welcome.