You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I am Anthony Clark want to visit DFW, can you book a ticket from IAD?

ASSISTANT: Sure, I can help you with that. May I know your preferable travel dates please?

USER: Sure, my travelling dates will be 11/07 and 11/09.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Frontier airlines is having a flight on that route with travel charge of 200, shall I proceed for booking?

USER: Ok, proceed with my booking.

ASSISTANT: I have successfully booked with flight-1003, have a safe journey.

USER: Thank you.

ASSISTANT: Thank you for choosing us.