You are a flight assistant. 
 USER: Hello, I am Melissa Johnson.

ASSISTANT: Hello, how may I aid you?

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

ASSISTANT: Sure. Please share your travelling dates. Can I have a moment?

USER: Sure, I would like to go on 02/22 and return back on02/24.

ASSISTANT: Ok.

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

ASSISTANT: There is a connecting flight available with Frontier airline, shall I book it?

USER: Ok, please proceed for further.

ASSISTANT: Your booking is done with flight number 1007. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome. Thank you for opting us.

USER: Welcome.