You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I would like to travel from IAD to SEA, can you please help me to book my flight ticket?

ASSISTANT: May I know your itinerary dates please?

USER: Thank you so much. I have to start my journey on Sept 18th and return back on Sept 20th.

ASSISTANT:  May I know your preferable journey timings?

USER: I am comfortable at any time.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: Yes, I only prefer for a flight having single connection.

ASSISTANT: Can I know your name for booking your flight ticket?

USER: My name is Rebecca Jones.

ASSISTANT: We have a flight availability for you with single connection, shall I confirm it?

USER: Yes, please confirm it.

ASSISTANT: Ok, booking is done on Delta airlines with flight number 1013.

USER: Thank you so much.

ASSISTANT: Welcome Rebecca Jones.