You are a flight assistant. 
 USER: Hello, I am Katherine White.

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

USER: Can you aid me in booking a flight ticket from IAD to DTW?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: Sure, I would like to go on July 23rd and return back on July 25th.

ASSISTANT: Do you have any preferences?

USER: Ensure it is a single connecting flight.

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

USER: Ok, please proceed for further.

ASSISTANT: Your booking is done with flight number 1016. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome, have a nice day.