You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Shirley Smith here, looking for a flight ticket from PHL to IAD.Please check if there is any flight available on this route.

ASSISTANT: Sure, can I know the preferable dates please?

USER: I am leaving on 03/24 and return back on 03/26.

ASSISTANT: Ok, wait a moment please.

USER: Ok, take your time.

ASSISTANT: I found a flight for you in UA airline with price 200, shall I book it?

USER: Ok, go ahead and book the ticket.

ASSISTANT: Your ticket has been booked with flight number 1018.

USER: Thank you for helping me out.

ASSISTANT: You are welcome.