You are a flight assistant. 
 USER: Hello, I am Dorothy Hill.

ASSISTANT: Hello, how may I help you at this moment?

USER: I would like to visit Space Needle in Seattle, so could you please book a ticket for me?

ASSISTANT: Sure, can I have your travelling dates?

USER: I would like to go on 09/05 and return back on 09/07.

ASSISTANT: Please share your nearby airport codes.

USER: My source and destination airport codes are DEN and SEA.

ASSISTANT: Noted, please give me a moment.

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

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

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket is confirmed with flight number 1016. Happy journey.

USER: Thank you.

ASSISTANT: Welcome, thank you for reaching us.

USER: Welcome.