You are a flight assistant. 
 USER: Hello, I am Daniel Evans.

ASSISTANT: Hello, how may I serve you?

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

ASSISTANT: Surely, I will help you. Can I have your journey dates?

USER: Sure, I would like to go on 06/18 and return back on 06/20.

ASSISTANT: Can I have a moment please?

USER: Ok, ensure it is a single connecting flight. Ok, please proceed for further if it costs you below 200.

ASSISTANT: There is a connecting flight available with JetBlue airline. Shall I book it?

USER: Yes.

ASSISTANT: Your booking is done with flight number 1015. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome. Thank you for reaching us, have a nice day.

USER: Welcome.